Feature/bonus pts in rankings

[seanh1986]

Refactored Rankings page

• Changed from specifying columns based solely on an enum to now an object
• Object allows for specifications necessary to show bonus points (e.g., due to list of bonuses)
• More dynamic way of representing Rankings
• Added RankingFields (analogous to RankingFilters but for which columns to display)
• Now supports displaying bonus points in rankings

[seanh1986]