Autoturf refinement

[cormander]

As a campaign manager, I would like the autoturf to create a polygon turf instead of a rectangular turf so that we can reduce overlap with other turfs.

This feature is done when:

• Turf created with autoturf have more than 4 points
• Turf boarders other turf created with the same autoturf operation
• Overlap between turf is minimal

[cormander]

A good strategy to draw a polygon from a collection of points: https://stackoverflow.com/questions/8154899/drawing-a-polygon
A few notes:

• With lots of points, the resulting polygon is very jagged
• To reduce jaggedness, calculate the "outer bounds" points and use just those points in the calculation (removing points near the center of the collection)