add 'clipper' based offset converter - it created buffer around geometry so can't replace current impl
add 'clipper' based offset converter - it created buffer around geometry so can't replace current impl

Airphrame/mapnik,whuaegeanse/mapnik,mapycz/mapnik,mapnik/mapnik,mapnik/mapnik,yohanboniface/python-mapnik,Uli1/mapnik,lightmare/mapnik,zerebubuth/mapnik,lightmare/mapnik,naturalatlas/mapnik,stefanklug/mapnik,davenquinn/python-mapnik,mbrukman/mapnik,Uli1/mapnik,Airphrame/mapnik,mapnik/python-mapnik,manz/python-mapnik,whuaegeanse/mapnik,mapycz/python-mapnik,lightmare/mapnik,garnertb/python-mapnik,tomhughes/python-mapnik,pramsey/mapnik,yohanboniface/python-mapnik,naturalatlas/mapnik,cjmayo/mapnik,pnorman/mapnik,Airphrame/mapnik,tomhughes/mapnik,CartoDB/mapnik,davenquinn/python-mapnik,jwomeara/mapnik,stefanklug/mapnik,sebastic/python-mapnik,CartoDB/mapnik,mapycz/python-mapnik,jwomeara/mapnik,manz/python-mapnik,pramsey/mapnik,pramsey/mapnik,Uli1/mapnik,mapnik/python-mapnik,Uli1/mapnik,sebastic/python-mapnik,garnertb/python-mapnik,manz/python-mapnik,Airphrame/mapnik,sebastic/python-mapnik,whuaegeanse/mapnik,mbrukman/mapnik,jwomeara/mapnik,naturalatlas/mapnik,tomhughes/python-mapnik,garnertb/python-mapnik,zerebubuth/mapnik,davenquinn/python-mapnik,cjmayo/mapnik,mbrukman/mapnik,pramsey/mapnik,whuaegeanse/mapnik,yohanboniface/python-mapnik,tomhughes/mapnik,stefanklug/mapnik,mapycz/mapnik,tomhughes/mapnik,mapycz/mapnik,mbrukman/mapnik,tomhughes/mapnik,zerebubuth/mapnik,stefanklug/mapnik,naturalatlas/mapnik,pnorman/mapnik,mapnik/mapnik,mapnik/mapnik,jwomeara/mapnik,pnorman/mapnik,CartoDB/mapnik,cjmayo/mapnik,lightmare/mapnik,mapnik/python-mapnik,tomhughes/python-mapnik,cjmayo/mapnik,pnorman/mapnik