Make UITableView-compatible

[radex]

trafficstars

There's no reason not to use DiffyTables on iOS.

Watch-specific code ought to be separated from the general algorithm itself.

Then, a UITableView(Controller) extension could be added to make this easy to work with.

[radex]

I might want to tackle this at some point, but if someone is willing to do this work, I would gladly accept a PR