Import some useful vocabularies in the starter site

[rosiel]

The Starter Site creates some empty vocabularies like Country, Language, and Frequency, for which you most likely want to use an certain set of values from LC.
However the getting of these values into islandora through batch loads or migrations isn't trivial, so MIG proposes that we do it for you.

This PR populates

• Countries (MARC Countries, badly named because they are more often States and Provinces)
• Languages (ISO 639-2)
• Frequencies (LC Frequencies)
• Issuance (LC Modes of Issuance)
• DCMI Types (DCMI Types) (bringing it back in case of compliance needs).

The intention here is not to dictate that you must use these values - if you have your own you are most welcome to use those instead! But this is a convenience that makes the system more useable out of the box.

We also added a field to these vocabularies called "Code" in case it helps migrating users to look up a stored code. I set field_code to display in the form, but not the display, because users don't really need to see it.

I chose to make the Authority Link's link text equal to the URI itself, so that you can see it is a URI and also the code (which is the final segment of the URI). But I can change what displays if there's consensus.