Adding Formula for Ruby 2.0 preview 2
Merge pull request #249 from beanieboi/ruby-2.0-preview2

Adding Formula for Ruby 2.0 preview 2
Chop libyaml from 2.0.0-preview2 definition since it's bundled with Ruby now
ruby-build 20121201
Added a definition for JRuby 1.7.1
ruby-build 20121204
Move Version History into discrete CHANGELOG file
Merge pull request #251 from sstephenson/changelog

Move Version History into discrete CHANGELOG file
Add Ruby 1.8.7-p371
Merge pull request #253 from meineerde/1.8.7-p371

Add Ruby 1.8.7-p371
Switch the default mirror from GitHub Downloads to Amazon CloudFront
add 1.9.3-p362
Merge pull request #257 from goshakkk/193-p362

Add 1.9.3-p362
ruby-build 20121227
Delegate to `rbenv-help` for usage, if available
Fix `rbenv-help` invocation
Add summary lines for `rbenv install` and `rbenv uninstall`
Point people to the readme
Added a recipe for JRuby 1.7.2.
Merge pull request #262 from nirvdrum/add_jruby_1.7.2

Added a recipe for JRuby 1.7.2.