Also includes going from distance-based neighbor exclusion to angle-
based. (Distance doesn't work when very short segments are followed
by very long ones.)
Fixes https://gitlab.com/kicad/code/kicad/issues/2512
ADDED arc, circle and rectangle shapes for schematic. Shapes support
line styles and fill colors.
CHANGED sheet background color in Edit Text & Graphics Properties to
fill color (and it now affects shapes).
Pushed STROKE_PARAMS down into common and moved all shapes to using it
for stroke descriptions.
We no longer have any knowledge of the original start/end of the arc,
since SetArcAngleAndEnd swaps the start and end to ensure the arc is
always clockwise at the end.
Adds a method EDA_SHAPE::EndsSwapped() to notify whether the start/end
point of the shape were swapped.
Marek Roszko
Ian McInerney
Jeff Young
Seth Hillbrand
Roberto Fernandez Bautista