Added a lesson on making packages in R.
Updates based on suggestions by jdblischak
Updates based on suggestions by jdblischak
Merge branch 'master' of https://github.com/jainsley/bc
Small edits to lesson on creating R packages.
Merge pull request #1 from jdblischak/package

Small edits to lesson on R package development
Integrated suggestions in PR #507 comments
Merge pull request #507 from jainsley/master

Added a lesson on making packages in R.