rvm_basics

1. install rvm stable
	\curl -sSL https://get.rvm.io | bash -s stable --ruby
2. edit $HOME/.bash_profile
	[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"
3. source
	source ~/.rvm/scripts/rvm


commands
rvm list rubies
rvm install 1.9.2
rvm use RUBY_VERSION

rvm gemset create myproject
rvm gemset use myproject
rvm gemset delete myproject
rvm gemset empty myproject
rvm getset list

rvm gemdir