OSM Explorer Files

OSM Explorer V4.0

- Reorganized some of the classes, converted some to structs (with implicit conversions from peristent classes stored in database) and updated some documentation.

- Project now contains SharpMap project files. I've given up on writing my own slippy map component as the one I included in the class library is taken from someone else's slippy map project and the code is too messy for me to understand and fix  (currently the y-axis scrolling is incorrect and not transformed to Mercator projection; some arithmetic overflow errors as well). So I've begun integrating the class library with that of SharpMap (http://sharpmap.codeplex.com), a very well-documented rendering library with many features. The latest version of the RenderCollection class is the bridge between all the IRenderable objects and a particular app that renders anything. I haven't put together a working form app yet, but in theory it should work with a SharpMap.Map. As the class library continues to evolve I will work on making the rendering methods as generic as possible so that OsmExplorer library can be plugged into an existing slippy map project (of which there are many in existence, hence no reason for me to reinvent that wheel).

- Once the map rendering is set up with SharpMap, I will focus on cleaning up the database schema and debugging the XML import classes.