Simplified the testing for screen importance on a 2D map
Tighted up loading for single level mode.
Sped up transforms.
Merge branch 'develop' of https://github.com/mousebird/WhirlyGlobe into develop
add file that was not added to project in last commit
rename MapnikXmlStyle.m -> MapnikStyleSet
move params in to styleDictionary
Merge remote-tracking branch 'uppstream/develop' into develop
Fix min/max zoom reversed in layer rules