Onwards and Upwards!

A welcome to Andrew onto the team. Development moves up a gear.

After a brief survey, it's clear that ALSA MIDI is far from dead, so yoshimi continues to support it fully.

Quite a lot of unseen 'plumbing' in progress at the moment. Should make little visible difference at first, but the code gets steadily better, Xruns become less likely and hooks are in place for some nice enhancements.