Release 0.1.0

Final merge request for release 0.1.0 to satisfy this milestone! This needs approval from @clausen and/or @weber, if possible. The deprecated test_requires shift mentioned in #39 (closed) is in this MR, as well as a (for now short) documentation that I flipped the y-axis in comparison to matplotlib (mentioned in #14 (closed)). Only thing that is missing is a bit more verbose documentation and tests (which I postponed till now due to time contrains...).

Fixes #39 (closed) (an additional issue about tox is open for the future)

Closes #8 (closed), #12 (closed), #14 (closed), #16 (closed), #17 (closed), #18 (closed), #26 (closed), #36 (closed), #42 (closed)