Rapidpy

1. Time zone based data access
2. Pandas
3. Bug fixes

Added doc strings & tests.
Fixed multiple bugs:
- generate wrf inflow
- taudem
- ihg file generation

Added RAPID output to GSSHA time series (xys, ihg) files functionality
Added mpiexec command option
Various other bug fixes & improvements

1. USGS download update
2. Return period generation now uses multiprocessing
3. TauDEMpy made more flexible for watershed generation
4. Added daly mean & maximum modes for csv export
5. Various bug fixes

Updated to work with Python 2.7 and 3.5

GIS Additions:
1. GLDAS v.2
2. NHDPlus Network Connect function

Bug Fixes:
1. Weight table was previously missing a row
2. Muskingum Kfac generation uses float instead of int now
3. RAPIDDataset time check fixed
4. Print statement for goodness of fit fixed
5. Use connectivity file when creating m3_riv file now