Support for Product Advertising API Signing Version 2.
  -- Refactor to try and leverage original author's type classes. (for now)
Git ignore flycheck files.
ItemLookup call.
  -- Continued refactoring of god module Aws.Core
  -- Signing V2.
Minimal parsing of ItemLookupResponse.
BrowseNodeLookup for BrowseNodeInfo report group and then only child browse nodes.