Updated CHANGELOG, removed an unused function.

This is the last bit. 

Removed silly coordinate system transform that changes % to map system coordinates. That's really just very specific to the way we store coordinates.

The 3.0 branch now includes all the changes that we have in https://github.com/orta/NAMapKit (except much cleaner and tested :), so this closes #13.

Fyi, I've updated your project to use this branch successfully and everything looks good.