Python scripts for some statistics on tirza

 * transforms covariance matrix
 * process it and retrieve statistics on (see 814056f382629cf8047b5010512efdfe473ff344)
   - how many edges are between the different types (above the threshold of 0.3)
   - summing the convariance entries up in a new matrix
 * output in csv files  (see f19ec66443353d4d29b185bfc4e9afe555aa2340)
 * mostly hardcorded stuff...