mypy still complains about a few things here, but that looks to be
mostly coming from code that is very, very dead in python 3.
The tests don't run, and haven't since the python 3 switch. Will try to
revive those next, but it likely requires moving files around to fix the
package structure (source needs to go in a subdirectory to make a real
package, as do the tests).
Bug: None
Test: mypy . && pylint .
Change-Id: Ide55a41babecbd6684b73787b17e7f5fdb81c090
316dbf5332