Ran the copyright notice corrector script so all Mahara related files are correctly licensed under the GPL3.

 * Give authentication plugins titles and descriptions, which are used by the authlist pieform element so people see an easier name
 * Add a new API method to the PluginAuth class, is_usable(). This can be used by auth plugins to check that required extensions are available. The authlist element will tell the user what they need to do to enable a plugin.

Don't refer to the direction of the captcha image because it's used on the contact page where the image is above the description.

changing ldap to work when only email is set

changing view layout to be a two step process for users with editing columns on view/blocks turned off

Make sure that the institution dropdown on admin user search is set appropriately after doing a search. Move some language strings out of view.php and update places in the admin section where they are referenced.