improved the way add_gapfill.r handles years; the added function in add_gapfill.r made add_gapfill_singleyear.r obsolete and it was deleted from ohi_clean_fxns.r. Also, new system creates rows by year for Southern Islands rgn_ids and Antarctica (rgn_id=213)
test, this will be overwritten
this will be overwritten
committing this, hoping to be able to merge then

Merge branch 'master' of https://github.com/jules32/ohiprep

Conflicts:
	Global/WEF-Economics_v2014/data_prep.R
updated add_gapfill_sov.r (sovereign gapfilling) in ohi_clean_fxns.r. Worked on this with WorldBank-WGI data.
nothing changed here
finalized World Bank WGI data and saved files, both for normal and inverse. These are both rescaled; no need to save interim unscaled files with separate R script to rescale (as was done in 2013a). Also, reconstructed add_gapfill_sov.R so that it saves the file there instead of returning something for further processing.
Merge pull request #12 from jules32/master

finalized data layers for WGI and World Bank