Updated Jcrop from 0.9.9 to 0.9.12 for compatibility with jQuery 1.9+, fixes #24
Added rounding of Jcrop values in javascript

Jcrop removed rounding of floats when cropping scaled images in 0.9.10, causing
easy_thumbnails to fail to resize the image.

This change restores that logic, moving it from Jcrop to image_cropping.js,
ensuring that only integers are ever stored as they were before updating Jcrop.
Update jQuery to 1.9.1
Add Richard Terry to contributors