Markup to sphinx

This updates the markup.py python script for generating Python API docs from code samples in /examples/Training/python/ to generate sphinx docs (was previously doing wiki docs).

To test:
```
$ cd examples/Training
$ python markup.py
```
This will print to console the Python and Matlab sphix docs. (Matlab can be ignored for now since I don't think we're using it @jburel ?)

If you copy the Python docs from the terminal (look for --------- etc) into the ome-documentation/developers/Python.txt at the appropriate point and do $ git diff, you should see almost no changes. The only one of any significance is 
```
-    # a 2D numpy array. See [http://www.scipy.org/Tentative_NumPy_Tutorial]
+    # a 2D numpy array. See http://www.scipy.org/Tentative_NumPy_Tutorial
```
Need help or a bit of regex wrestling to get this fixed.