require RPython for travis
require RPython for travis

SOM-st/PySOM,SOM-st/RPySOM,SOM-st/RTruffleSOM,smarr/RTruffleSOM,SOM-st/PySOM,smarr/PySOM,SOM-st/RTruffleSOM,smarr/RTruffleSOM,SOM-st/RPySOM,smarr/PySOM