replaced get/post functions at http lib level with 'fetch'
refactore defaultHttpTransport to use fetch (not get/post
abstracted request formatting, header setting, response parsing in betfair/betdaq transprots
removed http parallel
added parallel support to betfair transport
refactored http parallel response
more parallel code
abstracted get_events request/response code
paralled events now working
abstracted betfair transport
abstracted betdaq transport
abstracted betfair transport
updated notes