Protege 3.1 Beta update (build 176)

There's a new beta build available on our Web site:

http://protege.stanford.edu/download/prerelease/full/
http://protege.stanford.edu/download/prerelease/basic/

** Please note: There will not be a beta build next Friday (April 22nd).

Changes
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1. Fixed an exception on "manage included projects" with new project.

2. Removed installation of a security manager.

3. Changed the way system classes are handled by the database back-end. 
Cleanest would be to rebuild all current databases (dumping to a file 
and then rebuilding). Rebuilding is required for OWL databases.

4. Modified the way classes are loaded by RMI. This may address some 
plug-in classloading problems in the server.

5. Fixed problems that prevented the override of system slots.