Added offset to screen markers.
First cut at vector dicing utility.
Create vector object directly from shapefile.  Quad paging layer now supports additive geometry.  Vector_dice updates.
Fixed some texture/image confusion.
Merge branch 'develop' of https://github.com/mousebird/WhirlyGlobe into develop
Fixed a timing bug in the momentum animation.  Offline renderer working better.
Was overzealously canceling renders.
Exposed the timout on remote tile sources.
Wasn't handling app backgrounding explicitly.
Merge branch 'develop' of https://github.com/mousebird/WhirlyGlobe into develop
Wasn't handling MaplyTexture replacement for UIImages everywhere.
Pinch now playing nice with rotate.
Now differentiating between user motion and automated motion.
First cut at annotations.
Popup annotations working.
Fixed compile warning.
Parsing the Mapnik config files and processing shapefiles into a pyramid structure.
First cut at self contained vector tiles.
Hooked up the styles.  First look.
Can now mess with importance scaling at quad image layer level.  Will update interactively.