add rvmrc file integration
added rvmrc!
add bundler install and gemset and ruby creation to rvmrc
added .use-ruby option
added ignore .use-ruby-* to gitignore
FIX for issue 446. Changed from 'each' to 'each_line' because ruby 1.9.x
no longer has 'each' for Strings.
Merge pull request #863 from mina/rvmrc

added rvmrc
Merge pull request #952 from umsmit32/issue-446

FIX for issue 446. 'each' for Strings undefined in ruby 1.9
Closes #446