Download translator/onboarding packages (with bundled dependencies) from GitHub to a local cache

[tjaffri]

#2 contains the API stubs for this (only)

This code mostly exists in the console app and needs to be refactored over into the lib. Some changes might be required since it will be running in Node.js instead of a Cordova webview.

[Sanjai] So this is Console app specific (fetching from Git Hub) ?
Since it is same (sub APIs) as below, how are we going to abstract out the underlying cloud service ? or we shall have separate stub APIs for this and below ?

Note that this is NOT specific to the console app, though it would probably use refactored code from it.

In the long term we might not need this component, since NPM also supports installing directly from GitHub (though that may be restricted to one-package-per-repo) The reason we probably need this in the near term is because NPM doesn't work in embedded Node.js today. There is a different issue #5 to track that work.

[jasongin]

Unimplemented API stubs for this are in #2 as the GithubPackageSource class.