New Tagcloud

To still keep the overview when more and more blog entries appear here I now added a tagcloud at the right corner of the blog.
The reader can now pick a field of interest and read all the blog posts to that topic.
There will be some main categories: 

• Thesis: all work I directly do for the written document
• Presentations: slides and entries about presentations I give about my thesis or the current state
• Surveys: any information (preparation, survey, results) regarding field research

This will help to give to blog a better structure and provide faster information.