fix #84 false format url and add version
fix collection preview
fix #70 Inconsistent key usage in image formats parameter
refactored collection component
fixed event issue
Merge pull request #90 from sulu-cmf/bugfix/js-memory-leak-hunting

[BUGFIX] refactored collection component
fix #91 false file name for exception invalid mime type
Added on-delete cascade from file version to tags
updated overlay options
solved merge conflicta
Merge pull request #94 from sulu-cmf/bugfix/overlay-memory-leak

Bugfix/overlay memory leak
fix #96 normalize segmentation folder length
changed minimum stability
Merge branch 'enhancement/96' into develop
Merge branch 'develop' into bugfix/cannot-delete-media-with-tags
Merge branch 'bugfix/cannot-delete-media-with-tags' into develop
Merge branch 'bugfix/91' into develop
Merge branch 'develop' into enhancement/70
Merge branch 'enhancement/70' into develop
Merge branch 'develop' into bugfix/84