Category endpoint updates to support getting top level categories per site and filter queries. Caching taxonomy in memory
Added statsd tracking for important methods, added macro / reflection to filter fields, performance improvement - prune and copy fields recursively, split get top level categories by site and get category by id in two endpoints, minor refactors
Made fields a set in Copyable macro
Adding tests and removing macro
Merge pull request #111 from lujameva/category_listingB

Category endpoint updates to support getting top level categories per site and filter queries