OAuthSwift
Make TimeoutInterval configurable to fix issue OAuthSwift/issues/667
Rather than providing a default timeout in the Config initialiser which is never overriden I've moved this up to the top level requests. This should mean its a non-breaking change but allows a timeoutInterval to be passed where needed and used by the UrlRequest. This is my first open source contribution so I welcome any feedback - thanks!
A thought from a peanut gallery... This seems to add an extra parameter into a lot of methods. Wouldn't it be better to subclass OAuthSwiftClient and override open makeRequest function and tailor request to your needs in there? It would need a few small changes to OAuthSwiftHTTPRequest, but it would result in much less changes overall.
