Update docker-library images

- `buildpack-deps`: added `curl` since we already had all the deps and it was a minuscule addition
- `gcc`: 4.9.2
- `java`: 7u71
- `mongo`: 2.7.8
- `mysql`: added 5.5
- `node`: NPM 2.1.6 and Node 0.10.33
- `php`: added more modules
- `rails`: 4.1.7 and Ruby 2.1.4
- `wordpress`: `php:apache` is now the official base
Added codename to latest openSUSE release

Codename added, file refactored a bit.
Added CRUX 3.1; Updated CRUX 3.0
Merge pull request #292 from infosiftr/update-docker-library

Update docker-library images
Merge pull request #289 from therealprologic/master

Updated CRUX to 3.1
Merge pull request #295 from flavio/openSUSE-13.2

Added codename to latest openSUSE release