Added setSeed.m

As given to us in an exercise session.
Added test_feats.mat to gitignore
loadFeatures: Added comment what it does
Lots of changes to my hacking files
Finished vertAvgROC.m

Published on http://moodle.epfl.ch/mod/forum/discuss.php?d=194628
Added some new data for KNN and LR
Added some figures for KNN and LR
Changes to my hack scripts