added flags for redoing buffers #40
buffering (ohi-science/ohiprep#74) shows slivers remained

After initial fix of Norway,Russia land to FAO NE Atlantic, realized
with buffers that slivers remained. Redoing the buffers also very slow,
so going to simply edit the buffers with a little fix it script. Then
ready for Baltic regions (ohi-science/ohiprep#75).
Baltic regions now with Thiessen polys

ohi-science/ohicore#75. fixing buffers with Russia offshore land
(ohi-science/ohicore#40)
adding prepped layers ohi-science/ohicore#29
fixed Baltic regions

ohi-science/ohicore#75
working geojson Baltic output ohi-science/ohicore#75
deleted redundant Antarctica shp and csv, since covered now by sp_*gcs.{shp|csv}. moved buffer csv outputs ({sp|rgn}_[buffer]_data.csv) from git-annex to ohiprep. updated README. see ohi-science/ohiprep#40 and ohi-science/ohiprep#74.
del lock file
TR layer prep. ohi-science/ohicore#32
Merge pull request #4 from OHI-Science/master

get latest for NP's Global/FAO-Commodities
Merge pull request #5 from OHI-Science/master

getting latest FAO commodities processed (not gapfilled) for 2014, and 2013 recoding
Merge pull request #6 from OHI-Science/master

getting NP updates
finished FAO-Commodities data files for NP (ohi-science/ohicore#34)

Hi @jules32,

I carried forward the previous year's value if the one for the max(year) was NA by using [dplyr's window functions](http://cran.r-project.org/web/packages/dplyr/vignettes/window-functions.html) (specifically the `lag()` function).

I moved the lookup for going from FAO commodities to Natural Products categories to table Global/FAO-Commodities_v2011/commodities2categories.csv. Note that I've also added a README.Rmd which outputs that table into the README.md when knitted from RStudio. (Since the README.html is redundant with the README.md, I added README.hml to Global/FAO-Commodities_v2011/.gitignore by right-clicking on the file listing in RStudio's Git pane.)

I created a new function `cbind_rgn()` to supersede `add_rgn_id()` (in src/R/ohi_clean_fxns.R), since I wanted a function to return the data.frame and not write to csv.

There are many updates to the Global/FAO-Commodities_v2011/data_prep.R. You'll pickup some cool tricks by comparing with the previous version (see History in Github).

It'd be great for you to consider:

- These commodities are present in the lookup and not found in the data. Are you OK with simply removing them from Global/FAO-Commodities_v2011/commodities2categories.csv?
  + fish_oil: 'Pilchard oil','Jack mackerel oil','Gadoid liver oils, nei','Anchoveta oil','Alaska pollack oil, nei'
- These commodiates are present in the data and not found in the lookup, by keywords. Should these be added?
  + 'shell': 'Powder and waste of shells'
  + 'oil': 'Aquatic animals oils and fats, nei, 'Oils and fats of aquatic animals, nei'

For the country to rgn_id lookup, I:
- renamed in the data_prep.R:
  + Sint-Eustasius to Sint Eustatius
  + Sint-Maarten to Sint Maarten
- and added to src/LookupTables/rgn_eez_v2013a_synonyms.csv:
  + 56,73,**Un. Sov. Soc. Rep.**,RU,RUS,ohi_region
Merge pull request #39 from bbest/master

buffers, baltic, NP