Result of SimPEG hackathon

- Incorporate field class on DC
- Add IP forward modelling and inversion
- Modify notebooks
- change folder name form simpegDC to simpegDCIP

simpegDCIP/Tests/test_forward_DCproblem_analytic.py

@@ -0,0 +1,12 @@
+import unittest
+import simpegDC as DC
+
+
+class DCAnalyticTests(unittest.TestCase):
+
+    def test_forwardAnalytic(self):
+        self.assertTrue(DC.Examples.Verification.run() < 0.1)
+
+
+if __name__ == '__main__':
+    unittest.main()