chore(build): use third_party.go

use the third_party.go project to replace our update script. This
requires moving a few things around and gets rid of a few annoying bugs:

- You can now bump individual packages
- A new src directory isn't created on build
- Less shell scripting!
- Things get built into ./bin/
fix(server/release_version): checkin to git
Merge pull request #460 from philips/use-third-party.go

chore(build): use third_party.go