Many iterations in Compare_FindMaxSubarray

Each algorithm will now solve the maximum subarray problem a number of
times determined by command line arguments. This allows their run time
to be more easily compared.
Changing structure of Compare_FindMaxArray.cc

Will now perform each of the repeated tests with a new array of numbers,
to get a better measure of the running time.
Modified Compare_FindMaxSubarray.cc

Fixed some bugs related to the timing statements.