See discussion at https://groups.google.com/forum/?fromgroups#!topic/silverstripe-dev/Dodomh9QZjk
Fixes an access issue where all public methods on FormField were allowed,
and not checked for $allowed_actions. Before this patch you could e.g.
call FormField->Value() on the first field by using action_Value.
Removes the following assertion because it only worked due to RequestHandlingTest_AllowedControllerExtension
*not* having $allowed_extensions declared: "Actions on magic methods are only accessible if explicitly allowed on the controller."
The entire framework repo (with the exception of system-generated files) has been amended to respect the 120c line-length limit. This is in preparation for the enforcement of this rule with PHP_CodeSniffer.
