TTS Enhancements

- Web UI now allows control of voice type, pitch, and rate.
- Text is limited to 140 chars.
- SHUTUP button shown but not implemented (need some ajax assistance)
- Word replacement map for protecting everyone from Zac & Mike (still a long way to go for sure)
- App auto-starts on boot
- System UI shows webserver address and most recent spoken phrase
- Added README to project for reference