Add licence/copyright information to all src files

lib/activity_pub.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub do
   @moduledoc """
   Delegates some functions to related ActivityPub submodules

lib/activity_pub/apply_action.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.ApplyAction do
   import ActivityPub.Guards
   alias ActivityPub.SQL.{Alter}

lib/activity_pub/aspect.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.Aspect do
   @moduledoc """
   We focus on `Aspects` instead of working directly with ActivityPub _types_. An `Aspect`—a concept we coined as well—is a group of fields and functionality that any `ActivityPub.Entity` can have.

lib/activity_pub/aspects/activity_aspect.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.ActivityAspect do
   @moduledoc """
   `ActivityAspect` implements _Activity_ as defined in the ActivityPub and ActivityStreams specifications.

lib/activity_pub/aspects/actor_aspect.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.ActorAspect do
   @moduledoc """
   `ActorAspect` implements [_Actor_ as defined in the ActivityPub specifications](https://www.w3.org/TR/activitypub/#actors). There are different _Actor_ types: _Application, Group, Person_, etc. but all of them can have common properties: _preferred_username, inbox, outbox, followers_, etc.

lib/activity_pub/aspects/collection_aspect.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.CollectionAspect do
   @moduledoc """
   `CollectionAspect` implements _Collection_ as defined in the ActivityPub and ActivityStreams specifications.

lib/activity_pub/aspects/link_aspect.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.LinkAspect do
   @moduledoc """
   `LinkAspect` implements _Link_ as defined in the ActivityPub and ActivityStreams specifications.

lib/activity_pub/aspects/object_aspect.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.ObjectAspect do
   @moduledoc """
   `ObjectAspect` implements _Object_ as defined in the ActivityPub and ActivityStreams specifications.

lib/activity_pub/association.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.Association do
   @enforce_keys [:aspect, :name]
   defstruct aspect: nil,

lib/activity_pub/builder.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.Builder do
   @moduledoc """
   Builds an `ActivityPub.Entity`. Delegated from `ActivityPub.new/1`.

lib/activity_pub/common.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.SQL.Common do
   alias ActivityPub.Entity
 

lib/activity_pub/context.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.Context do
   @doc """
     FIXME: To be improved, it is not working well in any case, as Alex didn't completely understand JSON-LD context

lib/activity_pub/ecto_types/language_value_type.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.LanguageValueType do
   @behaviour Ecto.Type
 

lib/activity_pub/ecto_types/string_list_type.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.StringListType do
   @doc """
   FIXME: this module probably is not needed anymore

lib/activity_pub/entity.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.Entity do
   @moduledoc """
   `Entity` is used to refer to any ActivityPub `Object` or `Link` in the library—ActivityPub `Object` and `Link` are disjoint, they are different things. An AP `Entity` is just a map which also has the field `__ap__` set to a `ActivityPub.Metadata` struct.

lib/activity_pub/errors.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.BuildError do
   @moduledoc """
   Indicates an entity could not be parsed due to invalid data.

lib/activity_pub/field.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.Field do
   @enforce_keys [:aspect, :name, :type]
   defstruct aspect: nil,

lib/activity_pub/guards.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.Guards do
   @moduledoc """
   Thanks to the `ActivityPub.Metadata` struct we can use some guards to make this library work in a similar way to Elixir's regular structs.

lib/activity_pub/iri.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.IRI do
   @moduledoc """
   This is *not* currently an implementation of the IRI protocol.

lib/activity_pub/metadata.ex

+# MoodleNet: Connecting and empowering educators worldwide
+# Copyright © 2018-2019 Moodle Pty Ltd <https://moodle.com/moodlenet/>
+# Contains code from Pleroma <https://pleroma.social/> and CommonsPub <https://commonspub.org/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule ActivityPub.Metadata do
   @moduledoc """
   The `Metadata` struct stores some metadata information that's useful to know if the `ActivityPub.Entity` is local (or coming from another federated instance), if it was loaded, if it was already stored, the implemented aspects, the types, etc.