Changing uses of we to you in the service container book chapter
Edited JMSSecurityExtraBundle doc link

It now points to the real documentation of this bundle and the version used in Symfony2.0, which is 1.0.
[2.1] Edited JMSSecurityExtraBundle doc link Edit

It now points to the real documentation of this bundle and the version used in Symfony2.1, which is 1.2.
Update reference/constraints/Image.rst

Seems that annotations do not support trailing commas in parameter lists like PHP arrays do.
[Dependency Injection] small changes
Added failure_path param
Replace MinLength with Length
replace maxlength constraints with length equivalents

Conflicts:
	reference/constraints/Collection.rst
max_length can also be guessed from Length
Added a note about request accept-* headers parsing.
Added information about accept-* headers request methods.
Added link to cookbook article

To clearify the scopes.
Created intro text of the Twig Reference
Added functions section
Added filter section
Created tags section
Added 'almost core' bundles
Removing uses of we from HTTP caching book page
Component>DI>Workflow Adding missing word

To do also on master and 2.1 branches. Thanks
[#1881] Fixing bad call to getting flash messages in PHP