added make uninstall
moved beacon.css out of jquery-ui theme folder.  this makes it easier to add new themes.
added adLDAP for authentication.  removed hashed password from session variables.  session is confirmed by existence of auth_username alone.
added BeaconLDAP as a wrapper class for adLDAP.

removed settings.php file, added example.settings.php.  updated install target on Makefile to copy example.settings.php to settings.php in install directory.

changed login to use LDAP.

TODO: need to add a switch between MySQL and LDAP for auth in settings. should also push all settings to the conf file.