Separator logic

I added some logic to allow for a *separator* string. This may be useful when people need to enter multiple values, usually separated by a comma, for instance in a "tags" input fields.

Also added `pointer-events: none;` to $suggests, so that it won't block the underlying input fields from being clickable.

I added myself as contributor, and bumped the version to 1.2.1.. not sure if that's ok, please amend as you wish :)