Merge branch 'develop'

# Conflicts:
#	.github/CHANGELOG.rst
#	docs/conf.py
#	tabbycat/settings/core.py

Bump for release

Remove ads and bump version

Merge branch 'hotfix/2.7.6'

Merge branch 'hotfix/2.7.5'

Bump for hotfix release

Bump version so RTD will rebuild

Merge branch 'hotfix/2.7.2'

Merge branch 'hotfix/2.7.1'

Merge branch 'develop'

# Conflicts:
#	docs/install/heroku.rst