Mod collection config protocol

[Zetrith]

I plan on adding features related to Steam mod collections to Prestarter and I think one useful addition would be automatic collection config file sharing.

When a collection is installed, the idea would be to look through its description for a link to a verified host (like gist.github.com) with the configuration xml files. Prestarter could then download and make RimWorld use these files. The link could go, for example, at the very end of the description with some prefix.