Minor Features and Improvements

• New Features
  • Added NewGeoWithinRegionForCollectionFilter, NewGeoRegionsContainingPointForCollectionFilter, NewGeoWithinRadiusForCollectionFilter for queries on collection bins.
• Fixes
  • Fixed an issue in which bounded byte arrays were silently being dropped as map keys.
• Improvements
  • Removed and fixed unused assignments and variables.
  • Fixed typos in the comments.
  • Minor changes and formatting. PR #124, thanks to Harmen