Added rating stuff (see comments)

I added a call to the common rate classes RateTheApp...This will prompt
the user the 5th, 10th, 15th times they open the app to rate.  After the
20th time it will be an ok only option.  At any point they choose yes to
rate, they will no longer be prompted to rate.

I also added a new menu item 'Remove Advertising'.  When they click on
this it asks them to rate stopwatch for 5 stars to remove advertising.
Once they rate (either by this option) or through the change above for
5/10/15/20 rating, then advertising will no longer be visible.
(I simply collapse the control).  I do not make the numbers bigger
(maybe I should).  Also once they rate I know longer show this 'Remove
Advertising' menu option.  Thinking there is no reason to since they
have already done it....What do you think?  If we use that same logic,
then once they rate, we probably should also remove the 'Review' menu
option.  Currently the 'Review' menu option will always display
regardless of it user has previously rated app.

We need to test this.  Can you install on your phone...eventually mine
too....

If we are not going to do in app purchase, then this is all set.

If we are going to use in app purchase, then that should probably
replace the rate to remove advertising I did here with a purchase to
remove advertising.

Only thing left is adding countdown as a pivot....