updated for arm64 & arm7s
- libProj4 now a compiled dependancy, rather than a .a (maybe it's slower, but I can't stand .a's, and it caused heaps of issues this time too)
- project files updated for arm64

Discussion of libProj4's binary dep:
http://support.mapbox.com/discussions/mapbox-ios-sdk/1351-cant-install-mapbox-ios-sdk-properly
http://support.mapbox.com/discussions/mapbox-ios-sdk/1586-arm64-support
https://github.com/Alpstein/route-me/issues/85

So basically this is reverting #85 in Alpstein