corrected indentation
prototypical implementation for fixed size cropping
added many standard sizes
set_stdsize keeps aspect ratio when too large
set_stdsize bugfix keeping aspect ratio
changed w,h,left,right,top,bottom to image coordinates (prevent rounding errors)
adapted cropgtk to image coordinates
new computation of scale
fixed rounding
adapted standard resolutions to rounding
prevent shrinking when bumping
added 1:1 and some resolutions