First cut at python mllib bindings.  Only LinearRegression is supported.
The rest of the Python side of those bindings.
Incorporate most of Josh's style suggestions.  I don't want to deal with the type and length checking errors until we've got at least one working stub that we're all happy with.
Un-semicolon PythonMLLibAPI.
Bindings for linear, Lasso, and ridge regression.
Python side of python bindings for linear, Lasso, and ridge regression