Boolean parsing and parameter names

[nmoinvaz]

These two changes allow interacting with XML-RPC servers that do things a bit differently. The first change supports decoding response boolean values as true/false strings where as before it would only support booleans as 1/0. The second change allows you to explicitly use a parameter name in a method call.

An example would be: client.methodCall('GetItemByName', {Name:"Linda",SortAscending:true}, function (error, value) { });