Merge pull request #3 from OHI-Science/master

confirming up to speed with OHI-Science
fixing add_gapfill using dplyr
more work on add_gapfill; saved a whencev01 column!
datafiles now have a whencev01 colum; new .*_whencev01.csv files as well--to be improved further
deleted info from 2013a in this readme.md; will improve as we decide what to do
Merge pull request #7 from jules32/master

adding Whence files and examples