Git clone should one 1 liner
Add formula for JRuby 1.6.8
Merge pull request #213 from guilleiguaran/jruby-1.6.8

Add formula for JRuby 1.6.8
Added definition for jruby-1.7.0-rc1.
Merge pull request #215 from habermann24/master

Added definition for jruby-1.7.0-rc1
Add jruby-1.5.6, becuase yes, I need it.  Somewhere, happy pandas are becoming sad.
Merge pull request #216 from queso/jruby-156

Add jruby-1.5.6, because yes, I need it.
added build function using svn
switch svn in ruby-head build
switch svn
reviewed
Merge pull request #217 from hsbt/add-install_svn

Support install & build from Subversion repositories. Switch 1.9.3-dev and 2.0.0-dev to svn since the git mirror is no longer maintained.
Add support for JRuby 1.7.0 RC2.
Merge pull request #218 from doxavore/add_jruby_170rc2

Add support for JRuby 1.7.0 RC2
added 1.9.3-p286
Merge pull request #221 from mdemare/master

Added ruby 1.9.3-p286
ruby-build 20121020
Updated README

Seems like you have to run `rbenv install --list`, not `rbenv install`, to see the available versions.
Merge pull request #225 from manuelmeurer/patch-1

Updated README
Added support for JRuby 1.7.0