Updated 2.0 thesaurus doc

[Jürgen Spitzmüller]

Uwe,

I have updated the thesaurus section in 2.0.0svn's UG to the new situation. 
Attached is just this section. Could you please replace section 6.13 with it?

Thanks,
Jürgen

UG-thesaurus.lyx
Description: application/lyx