Four logging/bot changes:

- Add a debug.log with level=DEBUG.
- Change the time format in the log files to [%Y-%m-%d][%H:%M:%S]
- Add a [%H:%M:%S] time prefix to console output.
- Don't create connections until all plugins are loaded. This is to ensure that all plugins using server output are loaded before server connection begins.
Merge pull request #250 from daboross/patch-bot-logging-updates

Logging changes in bot.py