Simplify code by reusing ParseKeyValuePairs to extract existing query string portion of URLs.
Simplify code by reusing ParseKeyValuePairs to extract existing query string portion of URLs.

SaschaNaz/liboauthcpp,SaschaNaz/liboauthcpp,SaschaNaz/liboauthcpp,SaschaNaz/liboauthcpp,sirikata/liboauthcpp