geshifilter 5.x-2.0-rc1

First release candidate of the rewrite of the GeSHi filter for Drupal 5 from http://drupal.org/node/112067 by rötzi and soxofaan.

Beside adding features (like separate languages page and options for short language tags, e.g. <python>...</python> and <java>...</java>), some features from the 5.x-1.x branch were removed (e.g. "inline styling", usage of built in php highlighting). The documentation is also not updated currently.