Squashed 'plugins/rbenv-gem-rehash/' content from commit 4d7b92d

git-subtree-dir: plugins/rbenv-gem-rehash
git-subtree-split: 4d7b92de4bdf549df59c3c8feb1890116d2ea985
Merge commit 'cf276cf4cc9f240826b0b1d765c92d1205ff8d02' as 'plugins/rbenv-gem-rehash'
Squashed 'plugins/ruby-build/' changes from 26372ad..ef2ff77

ef2ff77 Merge pull request #518 from dpoggi/better-user-specified-definition-check
7b62fcf Fixes check for user-specified definition
a4853d5 Fix typo in CHANGELOG [ci skip]
9951b22 ruby-build 20140225
747d797 Merge branch 'graal'
ea481d2 Add test for JRuby+Graal
dcdccd7 Add support for JRuby 9000 bundled with the Graal VM
b1f3b10 Merge pull request #515 from nirvdrum/jruby-1.7.11
9789b00 Added a JRuby 1.7.11 recipe.
7710db5 ruby-build 20140224.1
8b28be1 Merge branch 'release-211'
ca5f310 Merge branch 'release-200p451'
4f81991 added definition of Ruby 2.0.0-p451
089523b ruby-build 20140224
3df033c added definition of Ruby 2.1.1
6593ea4 Merge branch 'release-193p545'
4a9fc55 Merge branch 'remove-libyaml-build'
4367354 remove build of libyaml, because bundled libyaml is already updated
9e56738 added definition of Ruby 1.9.3-p545
49aaa89 Merge pull request #511 from cmattson/java7-detection
060f50f Improve Java 7 detection
229bf9b Merge pull request #510 from Red54/master
ee01735 Add mruby 1.0.0.
36cb25d ruby-build 20140214 :cupid:
136d1f2 Merge pull request #508 from johnnyt/maglev
09d5d71 Merge pull request #504 from antifuchs/add-libyaml-to-2.x-rubies
1604bb2 Update MagLev branch from master-1.9 to master
1c62510 Use `colorize` helper for `require_gcc`
047953e Simplify Java 7 detection and error message
8896833 Merge pull request #507 from chrisseaton/jruby-9000-dev-check-java
484782a Require Java 7 for jruby-9000-dev.
c78eb9d ruby-build 20140210
42f41b4 Make whitespace consistent across build definitions
e5ade82 Merge pull request #506 from anthonator/master
f147a71 Added support for rbx-2.2.5.
58e6617 Merge pull request #505 from chrisseaton/jruby-9000-dev
2c07eaf Add JRuby 9000 snapshot.
45067e7 Install libyaml 0.1.5 for 2.x rubies also

git-subtree-dir: plugins/ruby-build
git-subtree-split: ef2ff77dfa538a705036cb757859eadf2c3bd442
Merge commit 'ede33f3aba821a9e3d1b70b2f3ab3bb9b6610081'