Provides some useful functions for working with UUIDs, built on top of
`java.util.UUID`.

Targeted at type-4 UUIDs. For more information you can consult [Wikipedia][],
and the [Java docs][].

[Wikipedia]: http://en.wikipedia.org/wiki/Universally_unique_identifier
[Java docs]: http://docs.oracle.com/javase/6/docs/api/java/util/UUID.html