Rename normalize script to hxlnorm.
Renamed counter script to hxlcount.
Added hxlcut script (removing cut functionality from hxlnorm).
Sample Liberia international-boundary data (derived from the CODs).
Script to check that locations in a HXL file fall within bounds.
Get bounds working properly with multiple polygons.  Add sample
international boundaries for Guinea and Sierra Leone.
Move parse_tags function to hxl.scripts package.

Allow hxlbounds to specify which tags appear in the report.
Moved sample_data/ folder out of tests/ to top level.