Add ability to stream replays from remote server & a "replay chooser" that can connect to that remote server.

[Hubcapp]

This would be good so that users no longer have to manually download replays as a prerequisite to playing them. They would always have an up to date replay library, and the issues currently plaguing Windows Users on extracting the replay library with its long file names, would no longer be an issue.

#28 would be a good prerequisite.