Added support for all form fields and removed hidden fields from the selected elements (#14)

Added option to auto tab on single value select lists when selecting a value
Added global methods to setup, remove and restore Autotab
Elements passed to Autotab now filter out hidden form fields
Fixed an issue with tabbing to a previous field that is disabled, resulting in the value being modified (#47)
Fixed an issue with saving a custom data value when it could be evaluated to a false negative
Changed minifier since samqode is offline
Cleaned up demo