Merge branch 'master' of https://github.com/vatsan/gp-r
Update HomePage.md

minor edits in the language
Added R, PL/R installation and verification

Added R, PL/R installation and verification
Updated installation instructions
updating file with upstream changes
merge messed up, trying a shortcut
restoring homepage.md
Merge pull request #6 from vatsan/master

Filled out sections on installation and merged upstream changes.