[Set] Async inputs

[jimdebeer]

Promise, stream, generator function

automatically resolves context, fixes stamps

for stream input think of a nice way to handle http prob a util that transforms and checks for errors

[jimdebeer]

stream tires to json it else it sets the output

[jimdebeer]

async inputs (promises) get cancelled when you set a new one -- this is ultra powerfull, they also get cancelled when you remove the object (nice for closing services in tests)