added easy_thumbnails to requirements
allow free cropping
Merge remote-tracking branch 'master' into free_cropping

Conflicts:
	example/models.py
	example/requirements.txt
	example/templates/modelform_example.html
	image_cropping/static/image_cropping/image_cropping.js
fix requirements.txt
test free_cropping in templatetag
Fix Python 3 compatibility issues
Rename TemplateTagTest
Extend and streamline README
Merge branch 'feature/free_cropping'