Improved base route name/pattern detection

- Uses more generalized regex to support things like:
    Symfony\Cmf\Bundle\MenuBundle\Doctrine\Phpcr\MenuNode
- See test case ..
Updated CHANGELOG.md
Merge pull request #1472 from dantleech/improved_base_route_name_generation

Improved base route name detection
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
Merge branch 'sonata/master'