Notes for pyepr - reproducible builds result

Version annotated: 0.9.5-1
Identified issues:
Identifier: randomness_in_documentation_underscore_downloads_generated_by_sphinx
Description eg. usr/share/doc/python-treq-doc/html/_downloads/04f29e03a7917886a0c8589f0f9018d6/
Unclear why the source is duplicated. Likely regression/feature introduced
in python-sphinx 1.8.3 or 1.8.2.

Our notes about issues affecting packages are stored in notes.git and are targeted at packages in Debian in 'unstable/amd64' (unless they say otherwise).