Added sphinx doc support. goto docs and type:

make html

see the wonderful documents!!

docs/examples/mesh/plot_grid.py

@@ -0,0 +1,12 @@
+import numpy as np
+import matplotlib.pyplot as plt
+from SimPEG import TensorMesh
+
+x0 = np.zeros(2)
+h1 = np.linspace(.1,.5,3)
+h2 = np.linspace(.1,.5,5)
+mesh = TensorMesh([h1,h2],x0)
+mesh.plotGrid()
+
+plt.show()
+