Merge branch 'data_factory_rework' of github.com:smwesten-usgs/swb into data_factory_rework

* 'data_factory_rework' of github.com:smwesten-usgs/swb:
  Partially working version; routines for munging land use lookup table are nearly complete.
  Create temp variables for transfers
  Begin work on code to transfer data from the data frame structure to the structure used in SWB runs.
  OK. Basic read of land use lookup table works. Framework is flexible enough to adapt to any other tabular data table.
  Subtle index errors result in segfault. Problem seems to revolve around string_list module.