Handle case where remote application sends back a new public key rather than the result we were looking for.

Now Mahara will import the new public key, then re-request the data it wanted.

Also, switched some exceptions to an XMLRPC related exception, to ease error handling.

Don't session_destroy before creating a new liveuser, I don't have any evidence that it does anything useful now.

fixing bug where users are unable to give logged in users, friends, public or groups access to views
problem caused by me changing what I thought were just language strings, which messed everything up

changed resume/editcomposite so it has standard save and cancel buttons rather than save and back to my resume

Remove the 'institution' column from the usr table (second time around, this time remove from install.xml too!). Remove the redundant (copied from Moodle) 'updateuserinfoonlogin' column from the institution table.

If an authentication plugin thinks that a user should be able to log in, and furthermore thinks that it is able/allowed to automatically create user accounts, then it is now able to do just that. The authentication API now has a new method - can_auto_create_users() - to define whether each authentication instance feels it can/should be able to do this.

If the instance thinks it can, it needs to export some information through the get_user_info method in order to populate the user account. Although this may change shortly to be optional, with the users instead being forced to enter any information that is required that they haven't otherwise filled out.

Ensure that we retrieve timestamps from the database in the correct form when trying to log in a user, otherwise they get stored in the object in the wrong form, leading to pain later.

Use the new 'isFull' method of the institution class instead of manually working out if an institution is full.

Such a test is done in several places in the codebase, sometimes incorrectly. Makes sense to centralise it.

Conflicts:

	htdocs/lib/db/upgrade.php

Correct the path to the view layout preview thumbnails, so it works when Mahara is installed in a subdirectory.

Conflicts:

	htdocs/lib/form/elements/userlist.php