Use width and height directly if no aspect ratio is passed.
use a class for pointer

with a fixed cropbox the pointers shouldn't be used
use a different template if fixed zone is requested
use background-image instead of img

makes it possible to move the background around easier than using an image node.
drag to reposition image
fix the off-by-one px error
documentation and method to toggle fixed
fix getData with fixed zone
fix fixed centering
fix aspect handling
center after setData
Merge branches 'fixed_zone' and 'set_data_wo_aspect'