updated r.project to 2.15.1 and added uninstall script.
Bad Maven download url

Current url resulted in a 404 - updated with new US Mirror url
Merge pull request #3 from yoshimov/master

updated R project
Merge pull request #4 from Iristyle/patch-1

Bad Download Url for Maven
commit
PYTHONHOME must be set in running script

Using SetEnvironmentVariable does not update current session
updated r project version as 2.15.2
Merge pull request #7 from Iristyle/patch-2

PYTHONHOME must be set in running script
Merge pull request #8 from yoshimov/r_update_20121101

updated r project version as 2.15.2
updated to version 2.15.2
updated to version 0.6.11.4