Create README.md
More change is here

Stuff and things
More Changes? YES!
Tables for chat and chat session.
Change chat to chat_url in archive.py.

This will make things clearer when we add the archive code.
Save chat metadata and chat session data.
Get chats out of mysql when loading the chat page.
New archive/delete configuration.

- Saved/group chats are archived to mysql periodically. If everyone has left the chat when the archiving happens, it's deleted from redis.
- Unsaved chats are deleted from redis shortly after the last person leaves, without ever touching mysql.
- Unsaved chats are automatically saved when the chat reaches 10 lines.
Remove the backlog option from archive_chat.

Just move the entire text to mysql every time.
Use primary key from logs in chats table.
Always show "view earlier messages" link in chats.
Use chat_url rather than chat when generating chat urls.
Update archive-related messages.
More stuff for switching the chats table's primary key.
Delete sessions from mysql if they've been deleted from redis.
Merge branch 'archive2' into redesign

Conflicts:
	main.py
	static/js/chat.js
	templates/base.html
Archive regexes and suffixes.