Protege 2.1 Beta update (build 197)

There's a new beta build available on our Web site: 
http://protege.stanford.edu/download/prerelease/index.html

Changes
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1. Added the ability to enter an arbitrary Unicode character into any text 
component by typing the four character hex code and then pressing the key 
combination "Alt-x".

2. Fixed a problem in the server code that broke the OWL Plug-in.

3. Revised the implementation of FrameID (should be transparent to everyone).

4. The afterLoad method on a Project plug-in is now called on "Build New 
Project".

5. Added a method called getInstallationDirectory to PluginUtilities so 
that a plug-in can now discover what directory it is installed in.

6. Removed some useless information that was being written to the PINS file.

7. Fixed a bug in the graph widget that was preventing "Undo" from working 
when adding/removing nodes from the graph.

8. Fixed some broken links on the "index.html" page that is installed in 
the root directory and points to local and on-line Protege documentation.