Reorganizing material to put novice + intermediate at top level
Removing explicit 'level' keys from Markdown files
*   Getting rid of old cheat sheets
*   Indenting error output cells
*   Removing explicit 'level' keys from Markdown files
*   Storing the generated files so that people who don't use those tools won't have to regenerate them.
*   Modifying .gitignore to reflect this.
*   Updating the Makefile to run Jekyll exactly once.
*   Command to install on the server
*   No longer worrying about making a page of images
*   Better (more guessable) name for the target that builds the website
*   Fixing image paths
*   Fixing up glossary entries
Merge branch 'sticking-with-jekyll' of github.com:gvwilson/bc into sticking-with-jekyll
Move @dhaine contribution to novice/r/ref
Merge pull request #347 from gvwilson/sticking-with-jekyll

Alternative build: still using Jekyll
initialized ggplot2 example
finished ggplot2 example, created makefile
hide results and fig in makefile using knitr options in Rscript
fixed options in Rmd, removed options from makefile
rendered md and R files from Rmd
makefile call knitr:: w/o loading library
added figures
clarified chunk that would hide code and figs
added readme with LOs, prereqs, time est, header info
Merge branch 'master' of github.com:dbarneche/bc into merge-Rmd
Moved novice R lessons from r/novice to novice/r.
Merge branch 'master' of https://github.com/swcarpentry/bc
removed .Rproj from tracking
ignore .Rproj files and .Rproj.user dir