Handle select tag initialization

[swaroopmurthy]

This allows initial-value directive to handle select tags by picking up the value of the selected option...

[glaucocustodio]

As it is in https://github.com/glaucocustodio/angular-initial-value/blob/master/test/example.html, this directive already support select tag, I just tested again and it worked.

[swaroopmurthy]

will check that out and let you know