Major tasks undertaken in this patch:
* New format_text argument, overflowdiv.
* New page layout Report.
* Review of all format_text calls.
* Added support for the report layout to all themes.
* Changed forum post display from tables to divs.

MDL-22950 adding new component column to the files table, unfortunately this change requires changes in all 2.0dev code, please review all custom code that was already upgraded to 2.0; fixing multiple problems and regressions in mod/assignment

blocks/html MDL-19844 Very minimal fixes to make HTML work.  Files still not working properly, see MDL-19844

AMOS START
 MOV [html,block_html],[pluginname,block_html]
AMOS END

MDL-20700 coding style cleanup - cvs keywords removed, closign php tag removed, trailing whitespace cleanup

even non-course and sticky blocks.

The parent context is block_instances.parentcontextid.

The block context should be used for checking permissions directly
related to the block, like moodle/block:view or moodle/site:manageblocks.

However, if the block is displaying information about the current page,
for example the participants block showing who 'here', then it may be
better to use the context of the page where the bloack is appearing -
in other words $this->page->context - to check permissions about the
user's ability to see participants here.

Or, if the block is displaying something stronly related to courses,
for example, a course meny block, the block should probably use the
context for $this->page->course to check permissions.

Prevent cloning of non-object. Delegate to parent method as fallback. MDL-14120 ; merged from 19_STABLE

MDL-8270 full block backup/restore - based on patches by Mark Nielsen and code in HEAD by Tim Hunt; merged from MOODLE_19_STABLE

This is messy because the links are hidden in the configdata column, which is serialized and base64encoded. So we have to untangle that, then ask the block whether there are any bits of $config that need to be fixed, then re-encode it before backup up. And reverse that on restore. It needs to remain base64 encoded in the backup file, so that the file format is backwards compatible.

I disucssed this with Eloy before doing it.

Merged from MOODLE_19_STABLE.

Now that the extended multilang filter is in place (bug 2879),
reintroducing format_text to the HTML block (bug 2878).

Trying to come up with another solution to work with multilang
tags (Bug 2878) (SE).

Fix for bug 2878:

HTML block now calls format_string to run filters as required.

Small improvement to HTML block; new html blocks have a default title instead of none.

Implemented discussion from bug 2547:

* Block authors no longer need to set $this->content_type
* If you want to make a "list" block, just derive from block_list
  instead of block_base
* All switch() statements gone from library code
* Overloaded method is_empty() added to block classes for convenience

Allow this in quiz pages, too.