Merge remote-tracking branch 'upstream/master'

* upstream/master: (28 commits)
  ruby-build 20130518
  Added JRuby 1.7.4
  ruby-build 20130514
  Replacing 1.9.3-p426 with 1.9.3-p429
  added 1.9.3-p426 and 2.0.0-p195
  Add a definition for Ruby 1.9.2-p0
  Add a definition for Ruby 1.9.1-p430
  Allow define RUBY_CONFIGURE_OPTS on rbx configure
  Typo (#353)
  Avoid touching CFLAGS unless explicitly requested (#352)
  ruby-build 20130501
  Restore -O3 default when we build with clang
  Build REE --without-tk on Darwin if X11 is missing
  Pass $RUBY_CONFIGURE_OPTS to REE installer with -c
  Default RBENV_VERSION to the globally-specified Ruby
  Extract `sanitize` helper
  Address some feedback from Jeremy
  cache git clone directory
  ruby-build 20130408
  add topaz-dev
  ...
added more ruby builds
Merge branch 'master' of https://github.com/zenhacks/ruby-build

* 'master' of https://github.com/zenhacks/ruby-build:
  updated the source to use taobao ruby
  ruby-build 20130628
  use Homebrew openssl if available
  added latest releases includes CVE-2013-4073
  making checksum comparison case insensitive
  Create maglev-2.0.0-dev
  update README.md to use zenhacks url
  Fix OpenSSL version pattern (#365)
  Treat the openssl 0.9.8(r|x) bundled with OS X as broken library. So the ruby-build will download and build the latest one.
  patched the url to taobao