Implement cache-delete for crop-values changed
Delete unneeded tests
Fix problem with getHandyImage from small image
Simplify tests to only test crop-specific stuff
Move var-definitions to top for documentation purposes
Rename function to name with underscore to mark it as private
Remove unused javascript events
Change closeAction to close
Only preserve ratio when both sides are set and cover is true
Set correct value for text
Add docu for getHandyScaleFactor function
Change unset crop to keep original to "keepOriginal"-flag in object
Implement loading-mask
Use wording working better with dimension-names

Dimension-name is for example don't crop but there's a button below
"crop image"
Update test to work with keepOriginal-flag, set crop also when out-width and -height are 0
Added update-script to change old parameter to new
Make width and height optional if image stays original

It wouldn't make much sense to set width=0 and height=0 to set image
to stay original. So width and height are not required anymore.