Added architecture overview (UML class diagram)
Fixed indentation width (is now 4 spaces)

I used http://www.python.org/dev/peps/pep-0008/#indentation as indicator
for a python indentation standard width
Created first version of the new experiment classes
The script works again (only -v parameter is not supported)
Removed some old stuff
Fixed some failing imports
Added new class to hold information for a single repetition
Added back the verbose command line parameter switch
The PDR analysis does now calculate the median, min and max
Can now calculate the standard deviation of any metric
Updated the architecture class diagram
Merge branch 'architecture'