R-programming assignment #2 and Regression course project (with mtcars dataset)
Revert "R-programming assignment #2 and Regression course project (with mtcars dataset)"

This reverts commit 92835fa31c040474fe225f2aaec50b5ca777b627.
Going back so we can put each course on its separate branch.
Added basic README to document content of master, which is intended to be the root for various branches, one for each course.
Merge https://github.com/bsuhm/datasciencecoursera
Consolidated README.txt into README.md from toolkit class