Rasterio 1 + python 3

Merge pull request #26 from mapbox/upgrayedd

[WIP] updates for rasterio 1.0 and python 3

0.8.0

bump version 0.8 [skip ci]

0.7.1

0.7.1 [skip ci]

0.7.0

0.7.0 [skip ci]

0.6.0

Update setup.py

0.5.0: Merge pull request #12 from mapbox/blob-mcqueen

slight tweak in masked compare

0.4.0

0.4.0

0.3.1

bumping version [skip ci]

0.0.1: Merge pull request #3 from mapbox/test-setup

resampling w/ rasterio