Clarify license
Fix bug that caused devices to be published on all available subnets if their app-selected subnet was unavailable.  See #621.
Fix SuiteFifoInterrupt shutdown.

A thread was heap allocated, but not deleted - now on stack.
Add code for making the thread Join()able before dtor invoked.
Add email contact for license queries
Merge branch 'master' of ssh://core.linn.co.uk/home/git/ohnet