Release of GeboGebo 1.02

This releases main intense lay on the correctness of its XHTML output, so now it produces w3c conform pages.
Several improvements make working with GeboGebo easier as for example the access keys that are now working.
Some minor bugs were fixed, too.
In addition:
A free wiki hosting service based on GeboGebo is in development and will soon be available at www.wikihost.org so everyone can easily use GeboGebo without own web space.