Merge pull request #419 from pierredup/master

Allow to specify join type on related tables
Fix documentation
Revert #418
Update Grid.php
Fix unknown variables
Fix default & permanent select type filters

+ move the convert value into the process inseatd of the setting
fix pager check visible
Merge pull request #422 from tunght13488/fix-check-pager-visible

Fix pager visibility check
Fix css column name

replace . and : by _
Fix translations according to Symfony's translation rules
Merge pull request #427 from WARrior-Alex/master

Translations of pager phrase "%count% Results, " and symfony's pluralization rules
Update add_row_action.md
Add export visibility settting feature
Fix #436
Update PHPExcel_excel5_export.md
Allow to give a name when adding an attribute
Merge pull request #439 from matthieuauger/row-action-add-attribute

Allow to give a name when adding an attribute
Fix spelling
Fix #403
Update messages.es.xliff