Karl

created a weighted scorer and started writing tests

2

I created a weighted scorer that scores by running (in essense): ``` python total_score = np.zeros(len(blocks)) for i, block in enumerate(blocks): score = sum([constraint.weight * constraint(....) for constraint in block.constraints])...

moved moon_altaz to the non-location get_moon

3

This is a follow-up to #213 and removes the location kwarg from the `get_moon` call inside `Observer.moon_altaz` and uses the array for the following `.alt`, `.az`, and `.distance`s.