chore(license): MIT
feat(account): attribution and legal stuff
fix(grunt): don't remove necessary whitespace
fix(font): explicitly define font-family

Chrome can't handle the `apple-system-*` font definition anymore.
As it just falls back to the default serif font the font-family is now defined explicitly.
fix(taskcell): scroll works on Android/Chrome

Doesn't interfere with scroll anymore, too.

Closes #16