This avoids the potential issue in which the status code would be "nil" or
"false", which HTTP client libraries may choose to signal an error condition.
* The :quote and :unquote methods are now plain functions and no longer
receive the "self" parameter. This allows to directly use the utility
functions provided by the HTTP client library.
* Renamed CqHttpClient to plain "httclient". The variable itself is local
to the script so it does not need to be unique.
