Updating copyright year in about dialog box.
Updating autotools build files.
Changing WSortView::operator[] to return a const reference.
Showing number of inversions in array (with fast update algorithm for swap()).
Updating copyright header in all files.
Limiting inversion calculation for large arrays.
Enable or disable inversion calculation by using a clickable static text.
Fixing warnings of wxWidgets due to number of items in grid sizer.