Moved engine condition key controls from Alt-{/Alt-} to m/M; changed cabin alert sound from stereo to mono; added Nav radios and DME to instrumentation; updated VOR/EHSI so it works and displays the DME.
Fixed some formatting.
Restored tiller steering capability; changed default to enable-tiller=false.
Help file updated with new keys for engine condition.
Merge pull request #1 from dogsaysmoo/master

VORs and NAV equipment