Rename util Java files to match their package name
Add a junit4 test suite
Replace old Clojure tests.clj with JUnit4 tests
Fix bug where punctuation combined with whitespace didn't sort correctly.

The strings "St. John" and "St John" should be treated identically for sorting
purposes.  The Normaliser class would (correctly) remove the punctuation, but
not the extra whitespace it introduced, so we ended up with "St  John" and "St
John".
Merge pull request #4 from vufind-org/punctuation-sorting-bugfix

Punctuation sorting bugfix