Design changes. The TREC-verb in the URI is now either 'r' or 'e' denoting access to a run or eval file. A request with 'r' uploads a run and runs the eval program on it to generate RUNID.e. The uploaded run is written to a file named RUNID.r. The concept of 'ret', 'res' directories exist no more. In stead the year/track/task/ directory contains everything; *.r files, *.e files, eval scripts, qrels and so on. (The problem with passing around the TREC-year before auth hasn't been fix in this commit).