Add basic Excel functionality
Added documentation and adjusted composer.json for the excel package
Fixing incorrect usage of the Doctrine ODM query builder
Fixing incorrect usage of the Doctrine ODM query object
Merge pull request #726 from robholmes/master

Fixing incorrect usage of the Doctrine ODM query builder
Updated some public to protected + fix missing space Japanse translation
Simplified the return statement
Merge pull request #725 from bobvandevijver/excel

Excel export of the list view
Fix 'es' translation
Merge pull request #728 from johnarevalo/patch-1

Fix 'es' translation