Add Quick Event - fast and eas

Nov 8, 2018

- Fixed possible crash while entering double slash (//).

New key word: n = minutes (letter 'm' is already taken by month)
You can create events just minutes ahead:
- 45n call dad (it will create an even in 45 minutes ahead)
- 14 35n catch up with Tom (catch up with Tom at 14:00 which will take abstractly 35 minutes)