Register OpenStreetMap: v0.0.1, v0.1.0

I've started writing a fairly basic module for parsing and interacting with OpenStreetMap map data. So far, a user can load in an XML datafile (the standard format used by OpenStreetMap), extract highways, buildings, and features, crop them to a specified area, and plot them using the Winston package.

While many languages already have an OpenStreetMap parser (Java, Python, Matlab, etc.), I have written all of this code in Julia, rather than calling an existing library. I plan to soon add the capability to compute routes through the map, but thought I would share an early release now.

This is my first time writing and sharing a package, so I'm very open to feedback.