Fixes
Instagram: Stop api call if no key is added.
Reddit: Fix bug for links without any media.
Youtube: Stop PlayLists and Channel Urls from triggering download.MediaHandler: Clean up repetitive code and squash it.
Client & Bot: Improve Error Logging.
Authorise: Fix Chat name for DMs.
Additions
Add: Dockerfile, run
Add: Plugin loader.
Beta: Bot Mode.
