DOC: typo
PEP8
FIX bug #832 + testcase
Merge pull request #937 from sciunto/doc

Fix typo in SimilarityTransform docstring
MAINT: python3 compat.
Merge pull request #938 from sciunto/draw

Ellipse should not return coordinates outside of the image (closes #832)
Merge pull request #939 from sciunto/py3

Python 3 compatibility for contribs build script