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
initial testing on using bash to build repos
Replace "LIBDIR" with "LIBRARY" and make it user-specifiable
Add "SRC" and actually clone repos
Add a little "cloning" output so it's clear why the script hangs
Add actual building and some handy logging
add usage, only build all with `--all` argument
warn users about unknown 'repo:tag' combinations
script for pushing library images
Add "git-set-dir-times" and "git-set-file-times" (whoops)
Update "git-set-dir-times" to use "--no-dereference" so my fun mkimage.sh symlink in my Debian repo doesn't break on not-my-machine :D
getopt added for much beauty
Parameterize library, src, logs, and namespaces
Use magic extglob bash syntax instead of explicitly ignoring MAINTAINERS in our loop
Update "git fetch" with intelligence about when to go fetch (ie, if we don't have the ref specified)
Add magic support for direct operation on files

Things that work now: (in any combinations)
- `./build.sh debian`
- `./build.sh debian:sid`
- `./build.sh ../library/debian`
- `./build.sh ../library/debian:sid`