2019-05-23 - BitBot v1.7.0

Changes
- Show usage examples for user/channel/server/bot settings
- Strip common command prefixes from PM commands so "!help" works
- Add !addserver
- Support triggering commands by regex
- Add auto-tweet setting
- Change auto-github to work for github urls too
- Add !masterpassword
- Typos/bugs in BATCH and FAIL
- Remove `ipv4` server attribute - figure it out automatically
- Fix crash caused by BitBot messaging himself
- IRCv3: draft/resume-0.3 -> draft/resume-0.4