server and client support for QueryParams (list of values in query string) and QueryFlag (value-less query string argument)
add tests for QueryParams and QueryFlag
add doc generation support for QueryParams and QueryFlag
Merge pull request #22 from zalora/more-query-params

More query params
HasClient: changing URI to URIAuth (and adding the first client test
case)
test suite: testing Client of Capture
client test suite: tweak
client test suite: testing ReqBody
client: correctly handle exceptions on error status codes