Added admin interface to manage channels and enabled plugins (#9)

* Added base admin login/logout flows

* Ignore local database

* Channel model

* Admin interface for channels and plugins

* Added database tests along with workflows

* Added some docstrings

* Ignore .coverage file

* Creating plugins docs WIP

* Documentation

* Black everything

* Some documentation

* Coverage for the plugins package as well

* DB Fixes

* Absolute FROM in Dockerfile

* Database and logging fixes

* Slack: Support private channels

* Added pre-commit

* black'd

* Fixed UserQuery.create

* Fixed ChannelPluginQuery.create exists call

* Added ChannelPlugin menu for debugging

* Ignore sqlite databases

* Updated contributing docs

butterrobot_plugins_contrib/dev.py

@@ -5,10 +5,11 @@ from butterrobot.objects import Message
 
 
 class PingPlugin(Plugin):
-    id = "contrib/dev/ping"
+    name = "Ping command"
+    id = "contrib.dev.ping"
 
     @classmethod
-    def on_message(cls, message):
+    def on_message(cls, message, **kwargs):
         if message.text == "!ping":
             delta = datetime.now() - message.date
             delta_ms = delta.seconds * 1000 + delta.microseconds / 1000