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
Modify for add getEntity to Row
Merge pull request #408 from matthieuauger/fix-403

Fix #403
Update messages.es.xliff
added comments
change name of variable
Symfony's CS and doc
new $class and call_user_func instead of ReflectionClass
fix tabs
Add controller call doc for mass action
Update add_mass_action.md