Merge branch 'hotfix/82' into develop
resetted composer dependencies
removed dependency to massive search bundle
fix #84 false format url and add version
fix collection preview
fix #86 original image is replaced by image with same name
add logging
throw exception when it tries to overwrite exists file
fix #74 don't coupled tagmanger to api/media
fix #74 dont coupled tagmanager to api/media
remove tags when not set
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