[jQuery] cluetip additional functionality

[barefoot1972]

The jquery.com suggest a feature would not let me login.  So I am
posting it here.   I added focus/blur event handling to cluetip. So it
can be used in conjunction with forms or other elements that you might
not want to hover or click.


added to: jquery.cluetip.js

=BIND EVENTS
-------------------------------------- */

  // activate by focus
    } else if (defaults.activation == 'focus') {

        $this.focus(function(event) {
            activate(event);
          });

          $this.blur(function(event) {
            inactivate(event);
          });