Pymc3 getting stuck after initialization

@jordan.howell2, thanks for trying it out. The exception in the end is almost the same:

sorry, unimplemented: 64-bit mode not compiled in\r. #include <Python.h>

Damn hard to root out why this is happening, but it seems to be a theano problem. I’ll link this discourse thread to a similar issue submitted to theano to ask for suggestions.