* Changes made to the SQLLite implementation of AssetMetadataMapping module to satisfy tests.
  - Pair programmed: Sid (driver), John (navigator)
* Changed AssetSet and MetadataSet typedefs (within AssetMetadataMapping module) from typedef's of sets to actual classes extending sets.
* AssetSet and MetadataSet now overload the == operator by comparing the AssetTag and MetadataTag pointers with their respective Comparators.