iOS 7 deployment target. Overlays drawn by renderers, not views
NSNumber category method tk_degreesValue

As a more semantic and abstract way to extract a decimal of the right type for CLLocation values.
Cleaner TKPointAnnotation will replace TKPinAnnotation
Remove remaining usages of "PinAnnotation"
Remove last reference to "pin annotation"
TKMapImage basic interface
TKMapImage with name implemented