add acl.isInRole function to test whether a user is in a certain role.  tests added for isInRole & userRoles functions.  version bumped
bump version number again
Merge branch 'master' of https://github.com/OptimalBits/node_acl

Conflicts:
	package.json
reuse addUserRoles function
rename function
Merge pull request #65 from schuttsm/master

add hasRole helper method