polylines almost

drawpolylines now plots laserlines
almost imports polylines - arcs aren't always the correct way around
though.
basically the plot function is moving the wrong way through the angles -
perhaps need to involve the sign of the bulge variable?
polylines almost almost

realised that if bulge + then L, -ve then R
(or visa versa - figure this out by trial/error, currently config works)
applied this effect by subtracting 360deg from any where bulge <0.  this
means it applies it in some places where it isn't needed...
polylines almost almost (minor improvement)
Merge remote-tracking branch 'origin/owen-air' into owen-uni

Conflicts:
	dxfTest.v11.suo
polylines working!!

the bulge change was correct - (subtracting 2pi) that I had, but the
condition under when to apply it was wrong.

Previously was using if(bulge<0) only, now uses if (bulge < 0 &&
(endTheta - startTheta)>0)