[importer] Work around inconsistent IO#gets in ruby 1.9.2
[importer] Work around inconsistent IO#gets in ruby 1.9.2

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