Most of the broken link were due to the move from www.cs.chalmers.se was to www.cse.chalmers.se in 2010.
+ Rename some txt2tags file from .txt to .t2t and remove abandoned .txt files. + Add program update_html that finds all .t2t documents and updates the corresponding .html file. It can be invoked with 'make html'. + Add style to some .html documents