changing name and input id into methods to reflect voce-post-meta changes
Merge branch 'namespacing_fields' of github.com:voceconnect/voce-post-meta-date into namespacing_fields

* 'namespacing_fields' of github.com:voceconnect/voce-post-meta-date:
  changing to output name and id via methods instead of properties of the Voce_Meta_Field class