Improved Efficiency

-Timer Method now moved from viewDidLoad to the start button so that
the label is not refreshed when the timer is static. As well, a new
method, staticLabel was added which stop and reset called to update the
label when the stopwatch is static. Its code was taken from the
updateLabel method.
-old code that was commented out was removed to clean up the project
-efficiency was improved significantly and now when the stopwatch is
halted, CPU usage is 0% instead of 20% (original)->10% (using a boolean
isCurrent)