Framework bug fix

Just a minor release to fix a fairly substantial set of bugs with the methods for retrieving KeychainItem's and passwords, and to provide an improvement to the methods for setting passwords, in order to allow for existing entries. The latter change will break existing code, since a new parameter has been added to the two relevant methods.

Special thanks goes to Mark Ackerman, who both spotted and fixed these problems.

On a general note, I apologise for the terrible delay on this release, and how insignificant it is. As usual, the inner workings of the Distributed Objects system are driving me insane, so that's still my current focus point.