Drop charade, cleanup setup.py

[gsnedders]

Replaces #219, splitting it up. It also gets rid of replacing the ast parsing of __init__.py, but I think we're unlikely to land that.

[codecov-io]

Current coverage is 89.23%

Merging #252 into master will decrease coverage by 1.31%

@@             master       #252   diff @@
==========================================
  Files            51         50     -1   
  Lines          6823       6733    -90   
  Methods           0          0          
  Messages          0          0          
  Branches       1317       1314     -3   
==========================================
- Hits           6178       6008   -170   
- Misses          485        555    +70   
- Partials        160        170    +10   

Powered by Codecov. Last updated by cc99095...987fd1d

[landscape-bot]

Repository health decreased by 0.08% when pulling 7906be4 on gsnedders:drop_charade into cc99095 on html5lib:master.

• 1 new problem was found (including 1 error and 0 code smells).
• No problems were fixed.

[landscape-bot]

Code quality remained the same when pulling 2a1ee9f on gsnedders:drop_charade into cc99095 on html5lib:master.

[landscape-bot]

Code quality remained the same when pulling beb0cd4 on gsnedders:drop_charade into cc99095 on html5lib:master.

[landscape-bot]

Code quality remained the same when pulling 5a62f05 on gsnedders:drop_charade into cc99095 on html5lib:master.