Added rss-category to try to make category-RSS; edited config.yml per instr

See https://github.com/snaptortoise/jekyll-rss-feeds for more.
added R as a category
Added rss-category to try to make category-RSS; edited config.yml per instr

See https://github.com/snaptortoise/jekyll-rss-feeds for more.
Merge branch 'master' of https://github.com/acaird/acaird.github.io
Added an R category