Implement geometric placement of flyers on ceiling pipes. Next is
stairwell, then done with geometry.

Rather than messing with trig, the easiest thing to do is just compute
start and end points and interpolate. The start and end points require
a little trig, but it's very simple.

Also fixed a bug in which the Layout Tool would have all parameters
modifiable when firsts started (then after you change to a different
flyer they grey out normally). Requires callijng updateEditableParameters
in constructor.

Please enter a commit message to explain why this merge is necessary,

Sheesh this is time sink.

Simulator prototype

See merge request !12

UI update to include configuring flyers on front window.

See merge request !11

calls, as recommended by Mark.

Problem with window highlight color still persists. Evidence
starting to suggest it might be a GL problem. Will test on
my Mac to be sure.

everything seems to be done.  Interpreters can be reset if in while loop and fifo are closed on process death

everything seems to be done.  Interpreters can be reset if in while loop and fifo are closed on process death