Updating Joomla! RAD Layer to FOF 2.1.0 stable

**Important: See [Joomla! Tracker Item 32727](http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=32727)**

Updating Joomla! RAD Layer to just released FOF 2.1.0 (stable).

Additions:
* Added required option to FOFFormFieldCheckbox
* gh-207 Added Table Behavior search in component folder as in FOFModel

Minor changes:
* gh-192 Show which form file could not be loaded in the FOFForm::getInstance error message.
* Passing arrays to FOFModel::setId() is deprecated. Use the setIds() method instead.
* Deprecated messages are now logged using a platform class, for better platform abstraction and forward compatibility

Bug fixes:
* gh-188 Typo in FOFController::_csrfProtection()
* gh-189 Fixed Akeeba Strapper layout under Joomla! 2.5
* gh-196 FOFModelFieldText constructor would not pass the $table_alias to the parent class
* Unable to add component-specific behaviours to models (regression)
* gh-203 Unable to create a new entity with behaviour "private" (frontend)
* gh-199 J3.2 Fixed form validation Javascript error
* Fix FOFFormFieldCheckbox (undefined $disabled and $onclick)

Many thanks to all volunteers who contributed their bug fixes and improvements in this new release, participated in the mailing list and helped testing FOF in real world situations.