Adjusted the order of methods so one can read them from top to bottom

I think this really enhances readability :)
Simplified the formatting of the analysis output
Improved PDR output format

The output is now formated according to the maximum number of digits we
need to display it
Baltimore can now calculate the average value from multiple result files
Aded the verbose cmd parameter
Added missing routing loops information to the PDRAnalyser __str__
Merge pull request #4 from FGrosse/master

Implemented multi iteration statistics generation