select: added change and selected events
select: added change and selected events

- you can bind change event in the select
- bind 'selected' event for handling a string of the selection (label
instead of value)
- some style fixes when the seleccion exceed the with limit.

tonypee/vue-strap,wffranco/vue-strap,BiodataMiningGroup/vue-strap,lotestudio/vue-strap,BiodataMiningGroup/vue-strap,wffranco/vue-strap,lotestudio/vue-strap,tonypee/vue-strap,yuche/vue-strap,yuche/vue-strap