Updated ModelToIdPropertyTransformer so it works with Entities which implement \ArrayAccess
Added FooArrayAccess class to allow testing of new code
See #2301
Updated logic and added Exception messages when an incorrect configuration is used.
improve Catalan translation
Updated ModelAutocompleteType::buildForm() to use any attr options set for this widget
Removed span5 default class from attr option and updated tests
Fixed issue when multiple sub-admins were added in form building
Added test
Remove box shadow

![remove box shadow at sonata collection delete button](http://i5.minus.com/jb1vODTaDGKiPT.jpg)
Remove box shadow at sonata collection delete button
Merge pull request #2325 from Bladrak/fix_multiple_subforms

Fixed issue when multiple sub-admins were added in form building
Merge pull request #2327 from spolischook/patch-3

Remove box shadow
Fixed collections delete/add button styles
Merge pull request #2328 from spolischook/patch-4

Fixed collections delete/add button styles
Updates preview documentation

Changes:
- New accept/reject button design with glyphicons
- css that actually hides the form (fieldsets are no longer used)
Merge pull request #2329 from Green-Cat/patch-1

Updates preview documentation
Merge pull request #2320 from davidromani/master

Improve Catalan translation
Update SonataAdminBundle.pt_BR.xliff
Update SonataAdminBundle.pt_BR.xliff
Merge pull request #2331 from cassianotartari/patch-7

Update SonataAdminBundle.pt_BR.xliff
Merge pull request #2305 from caponica/autocomplete_attrs

Render attr values for sonata_type_model_autocomplete widgets
Update SonataAdminBundle.pl.xliff
Merge pull request #2332 from axzx/patch-6

Update SonataAdminBundle.pl.xliff