time Funktion in GUI eingebaut

Einbau des Benchmarks für die Zeitmessung in die GUI
deleted unnecessary comments, changed text browser to label and changed get_time to private member of AlgorithmControlWidget
update in name conventions, sorting of file flow
Some improvments for the AlgorithmControlWidget benchmark method.
Merge pull request #21 from FormSeher/time-measurement

Implemented benchmark functionality.

Closes #10.