gradle: cleanups
MarkerLayer: render items in z-order
MarkerLayer: check if touch hits within marker extents
cleanup: Viewport
fix: do not unset alpha of BitmapLayer
add: Color.premulFade, fade should not be premultiplied by default
GeoPoint: cheaper range limiting
PathLayer: run first update without delay
animate PathLayer example
add Viewport.getBBox(int expand) to expand by gived pixels
MarkerItem: remove HotspotPlace already in MarkerSymbol
MarkerItem: change UID to hold Object
add AndroidGraphics.makeMarker() utility for loading rawResource