Old Fraction stuff
* Make a constructor
* Make a set method that takes two ints, and creates a fraction.
* Make an add method that takes a *Fraction as a parameter, and changes the current fraction to be the total of that one plus this one.
* Make a reduce method that reduces a fraction to simplest form.
* Make a toString method that converts a fraction into a string.
* Overload ostream like this:  https://msdn.microsoft.com/en-us/library/1z2f6c2k.aspx
New Fraction stuff
* Overload the istream operator.  I should be able to type in "1 / 6" for the fraction one-sixth.
  See http://www.tutorialspoint.com/cplusplus/input_output_operators_overloading.htm 
* Make f3 = f1 + f2 work.
* Make f3 = f1 - 12 work
* Make f3 = 12 * f1 work
* Make if (f1 < f2) work
* Make f3 = -f1 work

Due Fri Oct 25th.