Sight cross platform 3.1.0 alpha (jar)

Release notes:

We are proud to announce that who downloaded Sight 3.1.0 alpha BEFORE the 29th of October, 2004, may need to replace the bin/autoupdate.jar file by this autoupdate.jar. Small inacurracy was detected (file, opened for reading, is checked for write access before closing). It passed all tests unnoticed, but under some circumstances can prevent installation of all downloaded updates. If your auto update does not work, replace the autoupdate.jar in your installation.

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