Merge pull request myclabs#14 from remicollet/issue-perms

nothing need to be executable

Renamed DataFilter to ReplaceFilter + formatting tweaks

Merge pull request myclabs#7 from ProPheT777/improvement-1

Improve uncloneable exception

Merge pull request myclabs#5 from ProPheT777/feature-2

Add empty collection filter

Merge pull request myclabs#2 from DavertMik/master

Fixed cloning non-clonable items

Improved test

Renamed "CollectionFilter" to "DoctrineCollectionFilter"