added future in rowers folder

rowers/c2stuff.py

@@ -1,4 +1,9 @@
-from __future__ import unicode_literals, absolute_import
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+
 # The interactions with the Concept2 logbook API
 # All C2 related functions should be defined here
 # (There is still some stuff defined directly in views.py. Need to