Make dist.py compatible with Python 3

Author: robertlazarski

etc/dist.py

@@ -46,6 +46,6 @@
 
 call(["svn", "add", dist_dir])
 if release.endswith("-SNAPSHOT"):
-    print "Skipping commit because version is a snapshot."
+    print ("Skipping commit because version is a snapshot.")
 else:
     call(["svn", "commit", dist_dir])