Add mapnik-test-data dep.
Merge branch 'master' into mapnik-test-data
Add UI tests for adding csv, geojson, shapefile sources.
Slimmer mapnik-test-data package.
Use regex checks for srs string to avoid floating point 32bit/64bit fail.
appveyor bump.
Try omitting stderr output for windows.
More guessing at how windows/appveyor handles stdout/stderr.
More shots in the dark...
Merge pull request #522 from mapbox/mapnik-test-data

Mapnik test data