add total runtime to results.py
FIX #71: Allow arguments without a value

We now can use functions with argument, that have no value (boolean), such as '--UseSomeSetting'.

parse_cli checks whether the next argument starts with a leading minus. If this is
not the case we store the argument name as key and 'True' as value:
args['UseSomeSetting'] = True
Merge branch 'development' of https://github.com/automl/HPOlib into development

Conflicts:
	HPOlib/Plotting/results.py