Merge pull request #289 from daum/master

Fixed typo in DSVExport input param of title.
Fix #286 - Workaround for double escape twig issue

See [#868](https://github.com/fabpot/Twig/issues/868)
Added method to retrieve rows as array
Moved the DriverHeap class out of the Manager file to it's own file
Merge pull request #292 from pierredup/move_class

Moved the DriverHeap class out of the Manager file to it's own file
Merge pull request #291 from pierredup/rows_array

Added method to retrieve rows as array
Allow row actions to manipulate data in the manipulateRender function without overriding the defaults
Merge pull request #300 from pierredup/actions_row

Allow row actions to manipulate data in the manipulateRender function wi...
Update grid to allow mass actions to be executed on selected rows
Fixed CS
missing $this-> in getGridHtml method
Merge pull request #304 from radmar/master

missing $this-> in getGridHtml method
Doctrine hints management with Entity source
Merge pull request #306 from Jeremb/master

Doctrine hint management for Entity source
initialize hints property
Merge pull request #307 from radmar/master

initialize hints property
Workaround #282
Merge pull request #299 from pierredup/mass_actions

Update grid to allow mass actions to be executed on selected rows
Update Twig/DataGridExtension.php

getGridUrl can now return an export Url.
Fix #321