Add a readme.
protips from wikipedia, home of the whopper
Useful markdown notes
shhh
notes
The Rcpp code should live under the R folder.
Remove the level of indirection that the "InvWishart/" folder was.

Also commit a few reference papers (we didn't write them ourselves, dear copyright police!).
Outline draft v.00000000000000001
Merge pull request #4 from kousu/master

Sync #4: Outline