removing examples dir, has been replaced with "demos/" for most attractive...

removing examples dir, has been replaced with "demos/" for most attractive demos and "code_fragments" for small/lowlevel scripts

git-svn-id: https://dng.biozentrum.unibas.ch/svn/openstructure/trunk@2498 5a81b35b-ba03-0410-adc8-b2c5c5119f08