Add build status to the README
Add build status to the README

UCL-ShippingGroup/cartodb-1,dbirchak/cartodb,thorncp/cartodb,nuxcode/cartodb,future-analytics/cartodb,nyimbi/cartodb,bloomberg/cartodb,CartoDB/cartodb,nuxcode/cartodb,splashblot/dronedb,DigitalCoder/cartodb,dbirchak/cartodb,future-analytics/cartodb,raquel-ucl/cartodb,UCL-ShippingGroup/cartodb-1,splashblot/dronedb,nyimbi/cartodb,splashblot/dronedb,future-analytics/cartodb,raquel-ucl/cartodb,raquel-ucl/cartodb,nuxcode/cartodb,splashblot/dronedb,nuxcode/cartodb,dbirchak/cartodb,thorncp/cartodb,codeandtheory/cartodb,bloomberg/cartodb,DigitalCoder/cartodb,codeandtheory/cartodb,bloomberg/cartodb,UCL-ShippingGroup/cartodb-1,splashblot/dronedb,future-analytics/cartodb,CartoDB/cartodb,nuxcode/cartodb,CartoDB/cartodb,nyimbi/cartodb,codeandtheory/cartodb,future-analytics/cartodb,DigitalCoder/cartodb,UCL-ShippingGroup/cartodb-1,nyimbi/cartodb,bloomberg/cartodb,nyimbi/cartodb,thorncp/cartodb,raquel-ucl/cartodb,codeandtheory/cartodb,dbirchak/cartodb,DigitalCoder/cartodb,DigitalCoder/cartodb,dbirchak/cartodb,CartoDB/cartodb,thorncp/cartodb,UCL-ShippingGroup/cartodb-1,thorncp/cartodb,raquel-ucl/cartodb,CartoDB/cartodb,codeandtheory/cartodb,bloomberg/cartodb