Merge branch 'release/0.5.6' into dev
Added docs badge to readme
Added pypi and travis-ci badges to docs
Fixed an "opps" in the readme badge
Added more unittests (also rewrote assert_url_correct)
Merge branch 'feature/unittests' into dev
Fixed broken requirements.txt file ("=" -> "==")
Removed hack for broken responses dependency (now fixed, thank you dropbox)
Bump version
Updated requirements.txt
Merge branch 'release/0.5.7'