Update reference/configuration/framework.rst

This PR is related to this one https://github.com/symfony/symfony/pull/5347.
Update reference/dic_tags.rst

Adding tags to the tag list reference
Update reference/configuration/framework.rst

Changing backticks
add cookbook entry on creating dynamic forms based on services
camelCase variable names
complete config for form as a service
consistent use of DemoBundle instead of 'WhateverBundle'
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
Update reference/configuration/framework.rst

The GetSetMethodNormalizer is not loaded by default
merged all dynamic form articles in one. Added a section on advanced form configuration
Added a note about request accept-* headers parsing.
Added information about accept-* headers request methods.