Adds auto loading to apply mask to element

This allows the mask to be applied on page load instead of on click. New
setting 'autoLoad', defaults to false, when set true will apply the mask
to the element.
Added comment for autoLoad

Added a quick comment for the autoLoad setting. I may rename this in the
future to a name that fits better.
Updated description

Fixed description for autoLoad
Updated description and added demo

Updated description and added a demo
Added the allowEmpty setting

This will allow empty values obeying the allowZero setting.
added myself to the Contributors section