v0.2.0:
  date: 2014-05-03
  changes:
    - add size method to return raw size of data passed-through.
v0.1.2:
  date: 2014-04-18
  changes:
    - always use readable-stream for consistency.
    - use crc32.unsigned to get digest.
v0.1.1:
  date: 2014-03-30
  changes:
    - gracefully handle "no data" scenario.
    - trim down deps.
v0.1.0:
  date: 2014-03-30
  changes:
    - initial release.