Added configuration interface of the driving gauges page!  You can edit the layout realtime, cool.

mvi_5351.avi is a very short clip that shows a driving gauge page that started out identical to what
you get in pre17, using the provided interface I altered the layout to what the video starts out with.
At the beginning of the video the page is in normal operating mode, if the software were talking to 
the ECU and engine running, the gauges would all be moving displaying real data.

The first thing I do is hit 'c' to enter configuration mode, all the gauges get white boxes drawn 
around them clearly showing their boundaries, the focused gauge is outlined in a red box.

I press the space bar cycling through the gauges which you can see from the red square changing gauges.
Then I hold down both 's' and 'e' to move the start and end points of the RPM gauge scale, then I add
the shift key to change directions.  The effect is simple shifting of the scale in one direction then
the opposite direction.

I can press 1, 2, or 3 to change the gauge type, 1 = circular, 2 = horizontal bar, 3 = vertical bar
(unfinished).  In the cluster shown in the video I changed the nested TPS gauge in the tachometer to a
horizontal bar gauge, and the AF gauge to a horizontal bar gauge also (accross the bottom).  The rest I
left circular but moved the scales around along with changing the position and size of the gauges.

The arrow keys are used to move and resize the gauges, simply hitting up/down/left/right moves the
selected gauge in that direction.  Adding ctrl to an arrow key grows the gauge in that direction.
Adding alt shrinks the guage in that direction (just like manipulating the selection in map editing)

One complexity is drawing order, when you have overlapping edges to pack gauges more tightly or
entirely nested gauges like the TPS gauge in the example, you must sort out the order the gauges are
drawn in.  Currently, PGUP and PGDWN are used to raise and lower the current gauge relative to the
other gauges in drawing order.  So if the gauge you are working with is obscured by another gauge and 
you need to raise it in the drawing order, just hit pgup until it is above the gauge that was
previously obscuring it.  It's as simple as that, it's basically a bubblesort technique but you do it
yourself based on how you want the gauges layed out.

I will try get more lengthy and detailed videos demonstrating the gauge cluster editing in the future.

For now, you cannot save the layout so it's kindof annoying, after USB storage support is added you
will be able to save and load gauge cluster layouts, along with your screen / serial port settings etc.

Also, planned additions (before pre18 is released) are:
locating the gauge label within the gauge
locating the gauge numerical value within the gauge
toggling the display of the label or numerical value
changing font style and size on a per gauge basis
adding new gauges
removing gauges
selecting which data stream is associated with the gauge