DRY some file accesses
DRY some file accesses

SkyTruth/pybossa_tools,PyBossa/app-flickrperson,pgiraud/app-flickrperson,pgiraud/app-flickrperson,Skytim/TEGEconomicTest,Skytim/TEGEconomicTest,PyBossa/app-flickrperson,pgiraud/app-flickrperson,Skytim/TEGEconomicTest,SkyTruth/pybossa_tools,PyBossa/app-flickrperson