Promgen

- [BUGFIX] Ensure that invalid annotations are caught 113
- [CHANGES] Bump Python to 3.6 and use Pipfile for easier development onboarding 109
- [CHANGES] Update Django version 107
- [ENHANCEMENT] Add 'owner' field for Projects and Services 111
- [ENHANCEMENT] Initial read-only API provided by django-rest-framework 112
- [ENHANCEMENT] New homepage to show subscribed services 105
- [ENHANCEMENT] Refactor to support Project and Site rule exports 104
- [ENHANCEMENT] Support adding exporter defaults from admin gui 114

- [BUGFIX] Fix for missing promtool validation error 103
- [BUGFIX] Fix reference to self.get_object() in RuleToggle 99
- [CHANGE] Refactor notifications queue for audibility and reliability 94
- [CHANGE] Add prune-alerts command 106

This version refactors the alert sender queue to better separate responsibility between components and to provide a more auditable record of received alerts

- [IMPROVEMENT] Implement Django permissions for Rule editor 96

This first version implements permissions primarily for common, shared rules to reduce the chance of accidentally modifying the parent rule. In the future, permissions will be applied to more objects. Migrations will automatically create a Default group in the Django admin.

- [CHANGE] Update to Django 2.0 82
- [CHANGES] Re-add link to shard 91
- [IMPROVEMENT] Add /api/v1/query proxy 88
- [IMPROVEMENT] Add help text describing job label usage 93
- [IMPROVEMENT] RuleTest will test against all Prometheus instances 90

- [BUGFIX] Fix parsing error with silence end date
- [BUGFIX] Fix webhook POST data
- [CHANGE] Update Celery version for bug fix
- [IMPROVEMENT] Cleanup some page headers to make navigation easier
- [IMPROVEMENT] Simple proxy page for `/graph` view
- [IMPROVEMENT] Speed up services page with prefetch_related_objects
- [IMPROVEMENT] Support entering comma separated list of hosts
- [IMPROVEMENT] Support for disabling a shard (disables adding new services)
- [IMPROVEMENT] Use css grid to improve readability of long pages
- [IMPROVEMENT] Warn if parent rull is missing macro

- [BUGFIX] Allow STATIC_ROOT to be configured via Environment
- [BUGFIX] Fix bytes/string mismatch with outputting rules
- [BUGFIX] Fix error message when registering a duplicate Service
- [BUGFIX] Fix missing list of exporters on host detail page
- [BUGFIX] Fix typo in view names
- [CHANGE] Bootstrap default admin user when starting Promgen with an empty database
- [CHANGE] Change handling of DEBUG variable. Now requires that a value is set in /path/DEBUG instead of just the file existing
- [CHANGE] CONFIG_DIR renamed to PROMGEN_CONFIG_DIR
- [CHANGE] Temporarily disable typeahead plugin pending refactoring
- [IMPROVEMENT] Added Slack notifier
- [IMPROVEMENT] Ship promtool in docker image
- [IMPROVEMENT] Updates to documentation