Add Quick Event - fast and eas

Invalid date

- You can now put negative numbers in front of a key words, so "-3d 18 meeting" creates an even 3 days before the current date
- Invite guests entering their emails (they will be notified about your event)
- Fixed bug affecting URL links (https:// and http://).
- Modify the keywords - go to settings and update them to meet your likening (use / to set different versions of a keyword).