Add static methods for extra convenience, infer port if http

[Danappelxx]

Also added a couple tests that show old vs new functionality.

[paulofaria]

did you take a look at https://github.com/VeniceX/HTTPSClient? it's beyond HTTPClient in features.. instead of updating both independently I want to unify the implementation and just give it different stream implementations. so we would have https://github.com/Zewo/HTTPClient with the common implementation and then https://github.com/VeniceX/HTTPClient and https://github.com/VeniceX/HTTPSClient would be just the initializers injecting the stream.

[Danappelxx]

I think it would be very confusing to have two HTTPClient repositories. Either way, if that's a blocker here, we should get that done first.

[paulofaria]

Maybe we could put the Client and Server base implementations at HTTP? Not sure about that because it could make interoperability worse.

[Danappelxx]

I think that makes sense - I don't think the possible clashing will be an issue (if it is, we'll find out 😛).