Fixed pep8 and pylint warnings

Change-Id: If77c87511a45a3260f7298e71e44d992219837c6

Changed suffix in snapshotter

Change-Id: Id0df7a129c134295b8e45ba80ba8c5bc9af1ae34

Fixed SpamKohonen Python 2 incompatibility

Change-Id: Id974cd431fa40c23169dcdb545160bf897978c2e

Bumped version to 0.8.1

Change-Id: I1c9539dd18f92811d3ff63bd089c2ee1015dfb56