Added code for 01-creating-timer. Added NSTimer that logs 'tick' every second
Added code for 02-start-time. Now captures the number of seconds since stopwatch was started.
Added code for 03-format-time. Converts seconds to minute/second string and updates UI label.
Added code for 04-stop-timer. Now invalidates timer when stop is tapped.
Added code for 05-elapsed-time. Now restarts timer after stop.
Added code for 06-refactor-start-stop. Refactored startButtonTapped if/else code into start and stop functions.
Added code for 07-reset-button. Now properly updates reset button state. Reset button works when tapped.
Added code for 08-enable-disable-save. Added enable/disable save button functions & calls them when stop/start tapped.
Added code for 09-save. Now saves an Event with timestamp and elapsed time when the Save button is tapped.
Final day 2 commit (just a change in xcode use state)
Merge pull request #1 from pliablematter/doug/day2

Day 2 changes