Conflicts:
	lib/db/services.php
	version.php

Dan Poltawski authored Apr 01, 2015 and Eloy Lafuente committed Apr 02, 2015

This reverts commit 19ffcbe2, reversing
changes made to 2112dd44.

Conflicts:
	lib/editor/atto/yui/build/moodle-editor_atto-editor/moodle-editor_atto-editor-min.js

The commit also include some clean-up

Added a new set to set config using set_config() api
to make steps faster and more efficient

Conflicts:
	lib/db/services.php

Conflicts:
	lib/db/services.php

This removes the need to write tempfiles in these locations.

We now abstract the actual file generation to a new function.
We are then able to call this function from the other image generation
sources. This allows us to generate thumbnails in a more efficient manner.

* Stored files stay as stored files and are not temporarily re-written to
  disk;
* Strings containing an image remain as a variable and are not temporarily
  written to disk; and
* Arbitrary files are not captured to string.

Conflicts:
	lib/editor/atto/yui/build/moodle-editor_atto-editor/moodle-editor_atto-editor-min.js