List all visited messages in Mattermost from a past time range, no matter in which channel they were.

TODO:

• proper docs
• Color the output, randomly colorize each channel differently
  • random.seed(channel_name)
• maybe some kind of interactivity

. ./bin/activate
./mattermost-history.py

It will ask for a start date aswell as a delta. Then it will fetch messages from all chats within this time period and show it chronologically.