Add models.ImageField, forms.ImageField to support crop tool
Add validation of crop tool value
widget 0.6.7
Add supporting of default CDN effects
Rename ``crop_tool`` to ``manual_crop``
Update uuid_with_effects_regex to using named groups
Add how to run tests into README
Merge pull request #31 from uploadcare/image-field-v2

ImageField with crop tool support
Merge branch 'master' into better-exceptions

Conflicts:
	pyuploadcare/__init__.py
Add checking of width, height in  __getattr__, fix raising of APIError
Get rid of ``ModernTestCase``.