added optional precision flag to PostGeoJSON; still defaults to 6
added optional precision flag to PostGeoJSON; still defaults to 6

moskvax/TileStache,MetGIS/TileStache,SEL-Columbia/TileStache,moskvax/TileStache,robpvn/Vector-Tile-Research,mpuig/TileStache,TileStache/TileStache,robpvn/Vector-Tile-Research,Blechhirn/TileStache,moskvax/TileStache,mojodna/TileStache,Blechhirn/TileStache,jbants/TileStache,MetGIS/TileStache,mapzen/TileStache,mpuig/TileStache,Kosta-Github/TileStache,MetGIS/TileStache,robpvn/Vector-Tile-Research,mapzen/TileStache,mojodna/TileStache,mapzen/TileStache,TileStache/TileStache,Blechhirn/TileStache,SEL-Columbia/TileStache,SEL-Columbia/TileStache,Kosta-Github/TileStache,Billups/TileStache,Billups/TileStache,Billups/TileStache,jbants/TileStache,Kosta-Github/TileStache,TileStache/TileStache,jbants/TileStache