Move bundled gems into separate packages

[voxik]

rubygems rpm contains "bigdecimal-1.1.0.gemspec io-console-0.3.gemspec json-1.5.4.gemspec minitest-2.5.1.gemspec"??

• At least these components should have its own subpackage rpms.
• Also, for example the latest minitest is 2.9.1. rubygems (or rubygem-minitest built from ruby.... too complicated) should use latest minitest (and also please re-check components bundled in ruby - I hope ruby upstream will again unbundle these components ... this is again too complicated ..)

[bkabrda]

I have unbundled the first three, with these commits:
cd84df6
c4072b0
e0ea16c
a16a125