typo
Coding style  #88
Separate assert_hook imports from others
Add Image.flip() method
Add Image.flop() method
Remove unused import
Wrote the docs about transformation
Note for #104
Merge branch '0.2-maintenance'
Remove outdated note (#104, #62)
Add missing link to #65
Add Image.orientation property
Update changelog and add version information to the docstring
Merge pull request #106 from dittos/master

Add Image.orientation property