Added links to two new cookbook recipes
Standardised link formats, moving html links to references instead of inline
Added link to Image Preview cookbook entry from form_help_messages
removed the mention of sonata_type_translatable_choice being deprecated
Added mention that excludes takes priority over other settings
Changed definition formatting to use a definition list
Replaced notice about deprecation of TranslatableChoiceType in form_types.rst
Added deprecated phpdoc comment in TranslatableChoiceType class
Merge pull request #1566 from caponica/docs-20130811

Docs 20130811