Merge branch 'topic/jsonp_query_params'
Made lifting of extractors and decomposers to versioned instances use the PML pattern.
Accept and produce combinators are horribly mixing operations that they shouldn't.
Annihilated a major source of abstract-val NPE evil.
Added HTTP proxying service combinator.
Restored correct end-of-stream behavior for AsyncParser
Remove automatic transcoding from HttpService#~
Jsonp should allow asymmetrically typed services.