Bump version to 0.8.1
Merge branch 'release-0.8.1' into develop

* release-0.8.1:
  Bump version to 0.8.1
Flush stdout to avoid erroneous error message

Fixes #68, verified this on python2.7 and python3.3.
Merge branch 'issue68' into develop

* issue68:
  Flush stdout to avoid erroneous error message