#15 Make server interface asynchronous

[Andrew Whitworth]

We run into a major performance problem when posting an edit to the server. The whole application blocks and becomes unresponsive. Find a way to make this asynchronous, or at least find a way to update the UI during the transaction.

[Andrew Whitworth]

I should be able to use ithreads for this. See:

http://perldoc.perl.org/threads.html

I could run a mini event loop over the $thr-is_joinable() condition.