Merge pull request #196 from gregquat/2.1

Preparing the update from symfony-docs (2.1)
Merge pull request #199 from gregquat/2.1

updating from sf-docs 10/11/12
Update components/http_foundation/sessions.rst

added missing backslash
Merge remote-tracking branch 'upstream21/2.1' into 2.1
Create formatterhelper.rst
Update components/http_foundation/session_configuration.rst

https://github.com/symfony/symfony-docs/commit/ce350250f42242680a796fb0322a7acd36f08e42
Update components/console/introduction.rst

https://github.com/symfony/symfony-docs/commit/bf9495279cf05523d3c7b23a3077d06ef56f85bc
Merge pull request #202 from StefTweet/2.1

Updated at 13/11/2012
Updated at 14/11/2012
8417549b65366f0ac9ea8e9b0e8f31da61c2c6b2
346e3ce294ed558eb02a7e585156f648f83456ba
88f06c6895b3b24b7e6eb65d29e48cbfc23a1230
674dfe19ca8b6709f18837017f6e324b0810800b
e766f4dc2372e5aa83f5d07462dd7ad6b65326e6
Updated at 15/11/2012
9fb6dd7cbcd87b90839566b908d5d631ed2f6828
c318400ec78401881ef90516b8b6456a310f3973
Update cookbook/form/create_form_type_extension.rst

Commit 7b9733acad0efb81704eb4a6fe8ccf07fd6c0f4d oubli du 15/11/2012
Update reference/configuration/doctrine.rst

Correction
Update components/config/definition.rst

Correction
Merge pull request #207 from StefTweet/2.1

Updated at 14/11/2012 and 15/11/2012 of symfony / symfony-docs
translating cookbook/form/create_form_type_extension
minor tweaks after PR #207