field, detail message, size calculations

renaming field,
adding detail message on the field,
changing changewidth/height method to take cropping into account
adding method to update dimensions based on crop

not implemented yet
Merge branch 'master' of https://github.com/jcore/JCore.SitecoreModules.ImageCropping

Conflicts:
	JCore.SitecoreModules.ImageCropping.Web.v11.suo