Merge pull request #21 from slugmobile/master

validators for Unicode
update validator tests to be table driven

WIP for #13
Add Travis build status to README
Merge pull request #22 from deiwin/update/tests-to-be-table-driven

update validator tests to be table driven
Merge pull request #23 from stevenwilkin/add-travis-build-status

Add Travis build status to README
isUnicode renamed to isUTF. Also change UUID regex to lowercase