wai-extra: Consolidate test suite
wai-extra: Remove redundant liftIOs
wai-extra: Rely on OverloadedStrings instead of using pack explicitly
wai-extra: Move specs for Network.Wai.Parse to Network.Wai.ParseSpec
wai-extra: Split caseParseRequestBody into separate spec items

(one assertion per test)
wai-extra: Remove specs for parseSimpleQuery

(parseSimpleQuery has been moved to http-types + we have QC properties
their)
Merge pull request #304 from sol/spec-cleanup

Spec cleanup