Allows Nirvana apps to access the universe of libraries, dynamically.

This will be a library and a dependency of Nirvana. It provides acceess to github using the github API (and eventually maybe bitbucket or other places) so that Nirvana apps can reference them.

• Should take a reference along the lines of {"github", "nirvana/sofo", "13ef6092b75d95995c9ac377a86f0e4a88e6ebe0") or a tag instead of the commit hash. (Github may use the shortened form in their API not sure.)
• When this is a valid repository and commit, it should clone the repo to the local drive.
• DO THIS WITHOUT GIT INSTALLED ON THE LOCAL MACHINE. (eventualy this will be putting the repo into the datagbase, not the local directory structure.)
• This may involve walking the tree of the repo, but it will be used for repos of a specific structure so the tree walking code can be simple

at runtime and then call it!