improve id_attr and for_attr code. Rename current_item to field_index
title field should use formatter
Update all use of current_item to field_item. Field_item is set to x for hidden fields. Also fix the way it is calculated to be more precisce
store the field index of a group as the group_index property on the field. Use this for id & for attar
field name attribute to be handled by a function (similar to ids)

Update all fields to use this new function.
Update date time parse_save_values method to handle new format
Remove checkbox save value parsing as it is now handled automatically
Handle stripping of repeatable field data by field name, rather than blindly unsetting the last item.
Recalculate all input & label attributes when a field is cloned
fix a notice
tidy up and formatting
Timestamp field - parse save values not working
fix notice when saving repeatable groups
sort unix date_timestamp field for consistency with datetime_timestamp
Merge branch 'refs/heads/master' into better-groups-and-repeatable
A bit hacky, but fix multi select within groups
update jSelect version
Define vars outside of the loop
WYSIWYG - Use name and id correctly.
split id_attr into 2 functions - one to return, one to output