Added responsive function for carousel

- calculating the item to show on container width
- hidding arrows if count equal or less item count
Ext4 Controllers: add bindable controllers

More flexible alternative to FromToGrid and GridToGrid. Should be used instead of those
Bugfix Carousel

- return false onclick if number if no next slide
- show and hide slides depending on content width

reviewed by Niko
make contentWidthBoxSubtract optional

useful if resetMaster is used
Add dynamic padding-bottom as placeholder for image
Add "dont-hash-type" option to kwf-media-url
Provide image at correct size. Change image when changing size.
Only return defined sizes of image, not every pixel-width
Remove dpr2 stuff
Move calculations into template-vars
Add test for media-cache-delete
Introduce and use getBaseImageUrl function, update tests
Set correct min and maxWidth for different components depending on steps
Add isValidImage check to return invalid if dh-WIDTH should not be existent
Improve Events for media-cache delete
Add tests for media-cache delete
Set min and max-Width in template for js