Support for loading WKB polygons (from a file, MySQL, etc.)

[grgcombs]

Added code to load WKB polygons. Useful for folks who store and operate on binary geometry in databases like MySQL ... Also using binary geometry is more efficient when storing on the device, or as an alternative to sending lengthy strings of text coordinates over Edge or 3G cellular networks.

Included some sample binary polygons in plists (for convenience) to try out in the demo app.