Try setup.py for RTD

setup.py

@@ -0,0 +1,8 @@
+import os
+try:
+    import SimPEG
+except ImportError, e:
+    os.system('git clone https://github.com/simpeg/simpeg.git')
+    os.system('mv simpeg/SimPEG temp')
+    os.system('rm -rf simpeg')
+    os.system('mv temp SimPEG')