misc fixes

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

SimPEG/Maps.py

@@ -11,7 +11,6 @@ from . import Utils
 import numpy as np, scipy.sparse as sp
 from scipy.sparse.linalg import LinearOperator
 from .Tests import checkDerivative
-from .PropMaps import PropMap, Property
 from numpy.polynomial import polynomial
 from scipy.interpolate import UnivariateSpline
 import warnings
@@ -985,9 +984,3 @@ class SplineMap(IdentityMap):
         else :
             raise Exception
         return sp.csr_matrix(np.c_[g1,g2,g3])
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SimPEG/Utils/matutils.py

@@ -9,6 +9,7 @@ from builtins import object
 import numpy as np
 import scipy.sparse as sp
 from .codeutils import isScalar
+from past.utils import old_div
 
 def mkvc(x, numDims=1):
     """Creates a vector with the number of dimension specified
@@ -472,5 +473,3 @@ class Identity(object):
     def __ne__(self, v):return (not (1 == v))if self._positive else (not (-1 == v))
     def __ge__(self, v):return 1 >= v if self._positive else -1 >= v
     def __gt__(self, v):return 1 >  v if self._positive else -1 >  v
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-