incorporated the LDAP auth patch from v2.1.1
Merge branch 'master' into ldap_auth
implemented ldap auth methods.
improved code docs for ldap auth config settings.
Merge branch 'ldap_auth' into feat3615

Conflicts:
	web/application/config/default.ilios.php
added logic to createUserAccount() action for handling password-less user account creation for LDAP authn. refs #3615
tabs to blankspace conversion.
pushing flag to the view indicating whether user passwords need to be captured in account management screens. refs #3615
added logic to omit user password capture when LDAP authn is turned on. refs #3615
Merge pull request #144 from ucsflibtopfstedt/feat3615

added LDAP authn method.