Tue Nov 26 08:09:12 EST 2019

The epid, symmetry is important

It really seems to open things up.  Check out imagewriter.erl

Some interesting properties:

- Both push and pull interfaces can be provided.  It really doesn't
  matter!  One can be implemented in terms of the other.

- The "process chain commutation" problem is exposed in
  imagewriter.erl: where should the decompressor run?