stop flapper breaking everything if not on the network
partially there
fixes 623 - historical check state purging by days
Merge branch '626_check_freshness_metrics' into 623_purger
optimise, is hugely much faster now
bump dockerfile to 1.0
fix Dockerfile
Merge branch 'master' into 623_purger
Merge branch 'master' into 623_purger
change puts to logger in purge method
Merge branch 'master' into 623_purger
minor refactor as per @ali-graham's suggestions
Merge pull request #625 from flapjack/623_purger

Purge historical check states cli