- Added checks for several possible network and response errors.
- bin/GetNLCDForDEMExtent.py: Added ability download NLCD data from
  webmap.ornl.gov via WCS
- ecohydrolib/nlcd/daacquery.py: Created to support WCS download of NLCD
- ecohydrolib/wcs4dem/demquery.py: Refactored WCS code into generic library
  function
- ecohydrolib/wcslib.py: Created generic library function for WCS download
  of raster
- Update GetNLCDForDEMExtent.py to use DEM extent instead of bbox
- spatialdata/utils.py: Added function for getting raster extent
Updated version numbers for 1.01 release