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
Improve Events for media-cache delete, add test
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
Set correct image-width in imageUrl
Fix tests