Njit with np.argwhere, np.logical_and, and np.sum Numba v0.50.0

@randompast Bodo uses Numba to provide acceleration for Pandas code so you wouldn’t need to rewrite your code. It supports strings as well. Also, you can scale on multiple cores for additional speed up. Could you post your original Pandas code without all these rewrites so I can suggest how it would look like in Bodo?