Repaired Travis CI build's broken link to Apache ANT binary

Implemented a naming convention for USGS topographic map layers:

- USGS Topo Base Map
- USGS Topo Base Map Large Scale
- USGS Topo Scanned Maps 1:250K
- USGS Topo Scanned Maps 1:100K
- USGS Topo Scanned Maps 1:24K

Initial commit

Initial commit

Initial commit

Initial commit

Initial commit

Initial commit