Improvements to roll optimization

[taldcroft]

Key changes:

• Add useful info like roll range to get_roll_options output and HTML table
• Fix bug rolling around science target for ERs

Closes #44
Fixes #43

Requires sot/proseco#269.

[taldcroft]

@jskrist - here are the members of the new roll options dict. A "roll interval" is a contiguous interval of roll within which a particular set of stars are all available for star selection.

'aca':  deepcopy(self), # ACAReviewTable object
'P2': P2,
'n_stars': n_stars,
'improvement': 0.0,
'roll': # roll of 'aca'
'roll_min': # minimum roll in this interval
'roll_max': # maximum roll in this interval
'add_ids': set(),  # Set of AGASC IDs that are **added** within roll interval
'drop_ids': set()}]  # Set of IDs that are **dropped** within roll interval

[taldcroft]

@jskrist - This is ready. The main update from your perspective is the addition of roll, roll_min, roll_max, add_ids, drop_ids to the roll_options list of dict. I doubt you need to put the add_ids or drop_ids into your ORviewer reporting, that is more for ACA review and a bit for improving the roll optimization algorithm.

I'm merging this now so you can continue using master. You also need to use the recent master (2fe3c50) in proseco.

[taldcroft]

FYI here is what the new values look like as a table: