General fixes and cleanup

- Tweaked content
- Removed `sass --watch` instructions from README (Jekyll now handles Sass compiling)
- Removed CSS output file (Jekyll now handles Sass compiling)
- Add “Bitters” as the title in the Jekyll config so it’s pulled in to each page automatically
- Updated copyright info
- Updated [Normalize](https://github.com/necolas/normalize.css) to 3.0.1