fixed comments
Merge pull request #112 from rjleveque/dtopotools2

fixed comments
Change to columbia URL for test bathy
Implement new storm surge test using synthetic bathymetry

Also includes new additions to the tests and util modules to support the
fetching of the storm data as well from the NOAA best-track database rather
than relying on somewhere to download it from.
Merge pull request #113 from mandli/fix-bathy-URL

Convert storm-surge test to using synthetic bathymetry