misc fixes

- 2to3 on setup.py to allow python 3 import
- removed uneeded circular import in Maps.py
- added missing old_div o mathutils

setup.py

@@ -36,7 +36,7 @@ args = sys.argv[1:]
 
 # Make a `cleanall` rule to get rid of intermediate and library files
 if "cleanall" in args:
-    print "Deleting cython files..."
+    print("Deleting cython files...")
     # Just in case the build directory was created by accident,
     # note that shell=True should be OK here because the command is constant.
     subprocess.Popen("rm -rf build", shell=True, executable="/bin/bash")
@@ -53,7 +53,7 @@ try:
     from Cython.Build import cythonize
     from Cython.Distutils import build_ext
     USE_CYTHON = True
-except Exception, e:
+except Exception as e:
     USE_CYTHON = False
 
 class NumpyBuild(build_ext):