Support for Map Annotations

Improvement suggestion: add support for annotation class which one can use to add pin to map and also callout showing a text and possibly some graphics as well. Use case (indicative, exact behavior TBD): Application locates annotations to map. (Alternative: user selects to add annotation to map. User touches screen to locate annotation in map.) "Pin" object is located to that geo position. When user touches the pin, a callout box containing textual and possible some graphical content is shown. Annotations are very commonly used in various map applications and e.g. iOS has specific methods for this to make use of annotations easy for developers. Refer to vast amount of iPhone applications that use annotations supported by iOS/MapKit FW.