* Add black to CI tests

I'd rather have blackening be an optional check, but this will work for now

* Yep, messed up Travis

Again, sorry about the commit spam

* Bump accepted line length to 120

Going to auto-format at 100 but will allow 20% overruns

* Blacken

* Cap line length at 100

rip my undisciplined coding habits

* update black on the fly if necessary

* Ignore CC errors

* Only check modified files

* Only python files

* Re-blacken post merge

* Re-Blacken

* Fix deleted files

* Explicitly invoke python

The +x must not have gotten commited

* Forgot to blacken again

Hoisted on my own petard

* Re-blacken