Update several of the "language stack" images with new versions and updated commit hashes

This update includes:
- gcc
- java
- php
- python
- rails
- ruby
Merge pull request #194 from infosiftr/language-stacks

Update several of the "language stack" images with new versions and updated commit hashes
Update debian, especially for CVE-2014-0487 CVE-2014-0488 CVE-2014-0489 CVE-2014-5270
Merge pull request #199 from tianon/debian

Update debian, especially for CVE-2014-0487 CVE-2014-0488 CVE-2014-0489 CVE-2014-5270