update oauth.js to work in strict mode

changed arguments to args and function passBackControl to var passBackControl= function

the two changes want to fix this strict errors:

function passBackControl( response ) {
    ^^^^^^^^
SyntaxError: In strict mode code, functions can only be declared at top level or immediately within another function.

exports.OAuth.prototype._normaliseRequestParams= function(arguments) {
                                                          ^^^^^^^^^
SyntaxError: Parameter name eval or arguments is not allowed in strict mode