Dependency Injection in Build Scripts

[MatthewYork]

For the Scribe OAuth library, and undoubtedly others to come, there will need to be a way to inject the required dependencies into a dependent library's build script. Right now, it only downloads the library, but it does not link the two. This will be necessary moving into the future.

Scribe is currently broken at compile time due to unlinked dependencies. This makes it a great library to test with.