retina detection moved to layer
enabling cartodb_id's on vector tile

this is a manual hack. making such identifiers configurable next
id/cartodb_id handling cleaned up
fixing unit tests WIP
unit tests fixed
example for points added
example for lines added

geojson multiline handling fixed
fixed hit detection bug

few renamings feature / properties
lines example finished
network example WIP
ccss adapted for network example
made cartodb sql flexible for osm id columns
cartodb sql allows empty columns array

bubble example first version
polygon example added
initial version of choropleth example added