Merge pull request #189 from fredericbonjour/Admin

Updated Backoffice with new grid mode in <document-list/>.
Merge pull request #190 from fredericbonjour/Admin

Updated Backoffice.
Merge pull request #191 from fredericbonjour/Admin

Fixed Rbs_Website_Topic_FormController name.
Add Tree node management on StaticPage

Clear website base URl cache by event
Merge pull request #192 from inthause/documents

Add Tree node management on StaticPage
Fix StaticPage callback event
Merge pull request #193 from inthause/documents

Fix StaticPage callback event
[FIX] locals to precise which item is duplicated
Merge pull request #194 from renaudJennyRBS/list

[FIX] locals to precise which item is duplicated
[FIX] URL manager absolute URL generation
Merge pull request #196 from franckstauffer/dev

[FIX] URL manager absolute URL generation
Begin implemetation
Add php traits
Merge pull request #197 from inthause/traits

Add php traits in \Change\Documents namespace
Improve memory management on documents
Add properties names on PropertiesValidationException message
Add properties names on PropertiesValidationException message
Fix Http/Rest actions
Add 'return $this' on document properties setter
Merge pull request #198 from inthause/traits

Add 'return $this' on document properties setter