Created a folder for the 7th exercise (Chapter 13 Functions); Added ssort functionality;
Added the timer class, for keeping track of the execution time of a function;
Replaced raw C style array with std::array; Added a helper header file with std ostream output for std::array(s); Moved the whole testing process into a template function called sort;
Added comparison of the time it took to sort an array with different algorithms; Added a random content generation for an array;