added handling for uc_uid comparison for shib authentication
adjusted attrib name in auth controller
added language and handling for no institution id match on authentication
added config settings to default.ilios.php, adjusted multiple login error messages to support institution id
removed extra bracket from duplicate user error usercount
Merge pull request #655 from thecoolestguy/uci_custom_shib

added uc_uid mapping to shibboleth authentication