Set maxWidth and maxHeight to 'none'.

Some reset frameworks [set maxWidth img style](https://github.com/twitter/bootstrap/blob/master/less/reset.less#L81). maxWidth and maxHeight breaks jCrop actual image size calculation.
Merge remote-tracking branch 'anjlab/reset_max_width'

See https://github.com/tapmodo/Jcrop/pull/75
Building minimized js with max-(width|height) reset