Update docker-library images

Highlights include:
- fixed golang onbuild images (via `go-wrapper`)
- added python 3.3
- added ruby 2.0
Merge pull request #206 from infosiftr/update-docker-library

Update docker-library images
Add jurby
Update debian and ubuntu for CVE-2014-6273
Merge pull request #207 from tianon/CVE-2014-6273

Update debian and ubuntu for CVE-2014-6273
Merge pull request #196 from cpuguy83/add_jruby

Add jruby
Add ruby altname
Merge pull request #209 from cpuguy83/update_jruby_use_ruby_altname

Add ruby altname