Updated changelog and tag v0.8.

Merge pull request rq#770 from mtdewulf/queue-cancel-pipeline-fix

Don't run lrem directly if we have a pipeline

Bump to 0.7.0

Ignore flake8 checks in local.py

This is 0.5.6

This is 0.5.5

This is 0.5.4

Emphasize private nature of `stopped` property

This is 0.5.2

Bump to 0.5.1.