Only update when necessary.
Get markers working.
...with all the pieces :)
Markers are working.
Pull the serial port stuff away to it's own package so we can use a 
different serial port package (RXTX?) if necessary.
Throw 3 255s at the end of a tape buffer. It seems to help.
Get 2-color marker blinking working.
Smaller buffers (50 bytes) and triple 255 seem to help with hanging.
Don't know which one of the two is the solution.
Fix config to have markers mostly on.
Marge conflicts from today.
Make sure we are clean on push.
Merge remote-tracking branch 'origin/master'

Conflicts:
	BlinkyTapeDaemon/config.xml