Add action hook for additional non-input items to be appended at the end of the metabox.
Merge pull request #136 from wpsmith/master

Add action hook after table to append non-input items or non-table additions.
Merge branch 'master' into trunk

# By wpsmith
# Via Justin Sternberg (1) and wpsmith (1)
* master:
  Add action hook for additional non-input items to be appended at the end of the metabox.