disable ios build
cleanup: unused file
update android support library

no idea why gradle cannot find build-tools 19.0.3..
Inverts behavior of double touch drag gesture

Per Android guidelines, double touch drag up should decrease content scale and double touch drag down should increase content scale.

This is also the behavior in the official Google Maps Android application.

http://developer.android.com/design/patterns/gestures.html
Adds double tap to zoom
invert tilt gesture
make double tap zoom to screen location
fix double-tap zoom tests
Merge branch 'double-tap-to-zoom'
reset MapElement layer to default
refactor TileClipper

- fix: TileClipper check len<6 before len==0
fix: SimplifyDP handling of 'multi' geometries
cleanup: SimplifyVW
cleanup: OBB2D
cleanup: LineTexLayer
close TileSource on VectorLayer detach
fixme: re-init TileSet when count is zero..
submit update task on PathLayer.setGeom()
add MapPosition accessors
vtm-android: disable check-gl-error flags