Bump ruby-build to v20130408
specs
Add 1.9.3-p231-tcs-github-1.0.30
Add ruby::plugin
quote branch names in ruby::plugin

This resolves the weirdness described in #19 and #21 wherein git
couldn't clone ruby-build at a certain branch. I don't entirely know
what the problem was, but quoting the branch name fixes it.

Fixes #19. Fixes #21.
Change ruby::version API to add env, remove cc and conf_opts

Adding a bunch of one-off parameters to satisfy an inherently general
configuration problem seems a bit silly in retrospect. Using Puppet's
hashes seems like a fine use-case for this.

Requires a major version bump due to API breakage, though most uses
should be unaffected for 1.9.3 or later versions of Ruby.
Fix gitignore
Add ruby::ree
Always sort environment keys so ci is consistent
Make ruby::gem take ensure and pass it to rbenv_gem
Prefer the rbenv-gem-rehash rbenv plugin over rbenv-autohash gem
Bump boxen and repository reqs
lint
deprecate old homebrew migration path
bump ruby-build version to fix clang optimization

addresses huge performance problems with compiled rubies
see ruby-build/issues#335 and ruby-build/issues#340
Merge pull request #24 from mroth/fix-rubybuild-optimization

Bump ruby-build version to fix compiler optimization bug
Fix specs
Add a SKIP_PRECOMPILED_RUBIES environment variable to force all rubies to build
Merge remote-tracking branch 'boxen/master'