investigate EVA, how can the sigma 100 eva work that good?

see 31.01.2013 - 19:42 for details
print param search matrices and descriptor comparison only for selected glomeruli
don't sort according to mean in descriptor performance plot and plot only selected glomeruli if this information is given in the config file
compute percentile of *good* models in the predictions plot
color dots according to the performance of the all descriptors 

the idea is to compare if the performance if a glomerulus (q2) is consistent over different descriptors and methods
adjust method comparison plot to correctly visualize the results for all glomeruli instead of only the *best* 10
fix compare paramselection plots and make them a bit nicer
add list with all available glomeruli
remove old descriptor performance plot
refactor descriptor plot