debug draw of normals and detected event points.
kernel_store_obstacle_ids: passing edge marks image as an argument to kernel.
kernel-store-obstacle-ids: reading neigbouring edge marks.
renaming left-right edge obstacles etc to side 1 and side 2.
renaming left and right obstacles for edge points in opencl code.
kernel-store-obstacle-ids: renamed left&right to side_1&side_2.
trace-edges: rearranges arguments.
simplified edge tracing.
nice.
trace_edges: detecting event points and storing them in voronoi_traced_edges.
nice.
moved vec2 functions to a separate header.
sample-corridor: function to convert from footprint space to draw space.
sample-corridor: function to convert from footprint space to draw space.