Nikea/replay — pull request #43 by ericdill (2014-12-02 16:29:14+00:00)
Title: WIP: Initial prototype for replay <-> ophyd

- Created new_event(event), new_event_descriptor(event_descriptor),
and new_header(header) functions as well as the convenience
function update(payload_type, payload). These four functions
facilitate the interaction between ophyd and replay

@tacaswell don't merge this yet. It's meant to be a discussion with @dchabot regarding the ophyd <-> replay interaction