Bump Ruby and RubyGems versions: 2.0.0-p247 and 2.0.6
Run the tar-ball checksums
Match the major.minor Ruby subdirectory

Find 2.x.x versions of Ruby in the correct folder.
Untar with --no-same-owner; configure with prefix and make with make_opts

Configure with --disable-install-doc as well.
Default prefix at /usr; default -j10 make options
Put gemrc in /etc when the prefix equals /usr
Merge branch 'feature/ruby_2.x.x' into develop
Bump to version 2.2.2
Installs Ruby 1.9 or 2.0
Default versions: 2.0.0-p247 and 2.0.6
Configure openssl and readline with the default prefix
Document the checksum defaults
Document prefix and make options
Note how to compute the tar ball checksums
Merge branch 'release/2.2.2'