Add support for connecting to remote cores in the client

Created by: jayjaybillings

We need to add support in the client for connecting to a remote core.

Once upon a time we had this in the "ConnectCoreAction." Perhaps we can reenable that button? I don't think we will need to use the remote core proxy though because the OSGI remote service infrastructure should be encapsulating all of that.

Instead of only having the button and manually switching, it would be nice to actually create view that listed all of the remote cores that are connected to the client.

This is to support Ram's request in #261 (closed).