Safari Support for "Move All"

[diego-qgenda]

1. Open your demo (http://crlcu.github.io/multiselect/) in Safari (v8.0 or v9.0, maybe others)
2. None of the "Move All" (>> or <<) in the demo work

[diego-qgenda]

BTW: your change on issue #45 will also fix this one :)

var $options = self.$left.children(); //instead of self.$left.children()(':visible');
...
var $options = self.$right.children(); //instead of self.$right.children()(':visible');

[crlcu]

Hi @diego-qgenda

The last release (2.2.5) just went out and this issue is now fixed.