Refactor HTTP Request Node

[QuantumCoderQC]

This PR refactors HTTP Request node. Fixes some incorrect indices used and exposes more options. Also introduced a Callback Type output indicating the type of callback at the Out output.

Callback Type: Type of output.
    0 = Node Executed
    1 = Status Callback
    2 = Bytes Data Response Callback
    3 = String Data Response Callback
    4 = Error String Callback

Node now looks like:

Usage: May be used with Select Output Node to perform actions depending on callback type.