Add a metadata manipulator to split personal names

[mjordan]

Take names like "Mark Jordan" and return MODS like:

<name>
  <namePart type="family">Jordan</namePart>
  <namePart type="given">Mark</namePart>
</name>

Of course, any programmatic attempt at this will be pretty unreliable. So we should probably need to log all split names along with the ID of the object being loaded so a human can do QA on them easily.

[mjordan]

@MarcusBarnes thanks to your fix in #59, I can now continue with this new manipulator.