Issue #2376691 by slashrsm: Crop effect.
Issue #2376691 by slashrsm: Change terminology.
Issue #2376691 by slashrsm: Add CropScaleEffect.php.
Merge branch '2376683' into 2376691
Issue #2376691 by slashrsm: Create only one simple image effect that can be extended.
Issue #2376691 by slashrsm: Test image effect configuration forms.
Issue #2376691 by slashrsm: Add test for manual crop image effect.
Issue #2376691 by slashrsm: Fix few minor things.
Merge pull request #2 from slashrsm/2376691

Crop image effect