cleanup, remove use of deprecated methods
Merge pull request #3 from kutila/master

add getRoleByName(), getRoleByUri() methods to allow bypassing RestletUtilRoles
move identifier check to the top of the equals
avoid adding the Authenticated role when it already exists
add rollback
use null for fields that do not come out of the SPARQL query
default for missing fields to null and not empty strings
explicitly use getRole().getName()
bump to sesame release
fix findRoles to use this.getRoleByName
add implementation of getUsers
copy test for sesame realm over from oas
add tests for getUser
change test parameter type to Representation to ensure typesafety