Add persistent parameters to filter form as hidden inputs
Merge pull request #1491 from pulzarraider/persistent_parameter_filter_fix

Add persistent parameters to filter form as hidden inputs
expanded choice fields fixed
Merge pull request #1495 from FabianMartin/expanded_choice_fix

expanded choice fields fixed
Update README file
Missing brackets form_widget(child)
Merge pull request #1497 from DelphineGx/patch-1

Missing brackets form_widget(child)
Removed cannotBeEmpty() condition on persist_filters

The default value of this setting is false. If you actually put

    persist_filters: false

in your YML file you get an error due to the ``cannotBeEmpty()`` condition, which I think is not needed here.
Update advance.rst

Added documentation for easy and clean way to disable create/delete functionality for some Admin Class
Merge pull request #1499 from zhil/master

Added documentation for easy and clean way to disable create/delete functionality for some Admin Class
Fix extra space for the immutable array type
Fix extra div
Merge pull request #1498 from caponica/master

Removed cannotBeEmpty() condition on persist_filters
Changes in polish translation
Merge pull request #1501 from greengos/master

Changes in polish translation
Improved routing.rst documentation

Added example of using baseRoutePattern

Added description of how to remove routes only when an Admin is embedded in another Admin
Merge pull request #1505 from caponica/routing-doc

Improved routing.rst documentation
Adds a command to generates admin class, controller and services for a given entity
 - reimplemented the implementation here https://github.com/sonata-project/SonataAdminBundle/pull/925
Improve form errors popovers and colors
Passing the current object to the voters

As for ACL security handler, shouldn't the current object be passed to the voters ?