Highlights:
* Support for Python 3.5 - 3.7 on Linux, Windows, macOS (PR 129, 130)
* New pulse2percept.viz module (PR 84)
* Support for the AlphaIMS implant (PR 87)
* New contribution guidelines (PR 92)
* New issue templates (PR 93)
* New code of conduct (PR 95)
* Host documentation on https://pulse2percept.readthedocs.io.
Bug fixes
* Fix nasal/temporal labeling for left eyes (commit 9c3bddc)
* Fix plot_fundus for left eyes (commit a6ffdbc)
* Fix scipy.special.factorial (commit c9631ae)