Revert "Renamed README file to README.MD. Changed to markdown. Better instructions"

This reverts commit b88d72d2b794bddddade9ee51729b8b65425456e.
Revert "Revert "Renamed README file to README.MD. Changed to markdown. Better instructions""

This reverts commit f2534e1bbd481a31ca56d6b67b4004afc13d0d70.
Renamed README.MD back to README