add vtm-android-starterkit
gwt: use canvas defined in html

- handle resize in js
- app option for tileSize in MapConfig js object
make BitmapTileSource non-abstract
gwt: add vtm-web-js project
fix: ExtrusionLayer get correct sumIndices
cleanup: ExtrusionLayer
refactor: GdxMap
fix: dont fling to NaN
fix: MapEventLayer velocity when timediff = 0
cleanup: MotionEvent
gdx: add MotionHandler, use common MapEventLayer
fix: vtm-android-gdx build
android: rename MapView.getMap()
android: extract GestureHandler
android: move GL classes to gl package
cleanup: MapView
libs++
gwt: s3db layer
gwt: add MapUrl for url hash parsing and updates
gwt: fix LoadDelayTask, keep refs with task