If we multiple long lines in succession the start index got
miscalculated and part of the latter lines discarded.

Move message processors into their own package
Update ktor

Closes #11

Move handlers to their own packages
Update JUnit

To preserve the order of lines we offer them into a channel
without suspending. If we launch a new coroutine there's no
guarantee they'll execute in order, even if the method they
call is fair.

Expose status (connecting, negotiating, ready)
Fire ServerReady and ServerConnected events