PHP doc
return true in userExists early for cleaning up deleted users
bump version
control state and interval with one config.php setting, now ldapUserCleanupInterval. 0 will disable it. enabled by default.
improve doc
rename cli method to be consistent with  others
introduce ldapUserCleanupInterval in sample config
don't show last login as unix epoche start when no  login happend
less log output
consistent namespace for OfflineUser
rename GarbageCollector to DeletedUsersIndex and move it to user subdir
fix unit tests
add tests for deleteUser