Added change-handler-on-click to index
Fix #14 - Replaces aui-hepler-hidden

The two classes "aui-helper-hidden" and "helper-hidden"
should be replaced with class "hide"
Fix #15 - Prevent adding extra quotes

On replacing classes with aui prefix in scriplets
there were added extra single or double quotes.
In order to prevent that, this comit excludes the second group
from the regex during the replace process.
Fix #17 - Convert handler when used in prop value

Fixes the conversion of "handler", when used in array,
passed as property value. Example:

new A.Toolbar(
    {
        children: [
            {
                handler: function(event) {
                    instance._editEntry(contact);
                },
                icon: 'edit',
                label: 'label'
            }
        ]
    }
).render();