Doc and CS fixes;

Made Script::append() be able to declare "nothing" params with numeric array keys;

Made Script::escapeString() not encode bytes above 0x7F, in turn allowing for script's parameter string values to be influenced by charset settings;

Added some more tests with mocks for otherwise untestable conditions.

Fixed sending of charset converted streams;

Client::sendAsync() no longer throws an exception if a request is canceled multiple times by the returned value of a callback;

Reverted the script source getting addition, and in fact completely removed the concept altogether. File contents is fetched from the output of executing ":error" (which produces a !trap reply with the message in it), and this same mechanism can be used for getting output of scripts in general;

Made the rest of the CRUD Util methods throw RouterErrorException exceptions, each with its own code.

Created RouterErrorException and made it be thrown by various Util methods (more to come);

Added ParserException, used in Script for parser errors on complex values;

Made Util::setMenu() work for any relative paths that resolve to the root menu;

Made Util::move()'s $destination optional, defaulting to NULL, upon which no destination is set at the API call;

Moved most of Script::parseValue() into the new Script::parseValueSimple(), parseValueArray() and Script::parseValueObject() methods.

Util's escapeValue(), escapeString(), parseValue(), prepareScript() and appendScript() methods are now in their own new class called "Script", with the last two now being called just prepare() and append().

Added Request::verify() and Query::verify(), which the Client runs before sending the request (fixes #8);