WIP HADS collector/parser
HADS parser functional
HADS filters working properly
HADS tests
HADS start/end time filters
Add states shapefile for HADS bounding box filtering
Update README
Allow Canadian provinces in bbox filter
Actually perform a bbox filter for HADS
Fix HADS tests for time extents
Merge pull request #12 from daf/hads

Add collector for HADS