Added date to the 2.0.0 release
create isValid method call to check is a UUID matches the standards including tests
only call the getClockSeqHiAndReserved method once because it will have the same data each time
Merge pull request #11 from ericthelin/feature-is-valid

Merging in pull request to create an isValid method
Updated CHANGELOG for version 2.1.0 release
Updating HTML documentation for the 2.1.0 release
Bump version numbers and update Travis to test on PHP 5.5