Add alembic migrations for lat/lon int -> double, cc #267
Change models to use double for lat/lon, cc #267
First pass converting int lat/lon literals to double, cc #267
First cut removing (to|from)_degrees, cc #267
Fix lat/lon bugs in ichnaea/backfill/tests.py cc #267
Change a bunch of ints to floats for lats/lons, cc #267
Attempt to fix some int-float lat/lon issues cc #267
Fix more tests broken by float lat/lon cc #267
Switch Double columns to not use Decimal, cc #267
Switch int division to float division cc #267
Fix more float lat/lon bugs cc #267
Fix more float lat/lon bugs cc #267
Adapt mapstat code to lat/lon floats, close #267
Remove one dead variable and reword comment, cc #267.
Always str(round(float,7)) in customjson, even on python 2.7, cc #267
Tweak some more of the lat/lon float test values.