Docs: added doc for QML Maps.
Docs: added doc for QML Maps.

Change-Id: Ica237c5e87738bfc0d3f6f11f1601050a8a40092
Reviewed-by: David Laing <7ea5e41bbea500042c0bdf1932c62d87625bf4ac@nokia.com>

kobolabs/qtlocation,kobolabs/qtlocation,kobolabs/qtlocation,amccarthy/qtlocation,amccarthy/qtlocation,amccarthy/qtlocation