No functional change.

- Changing some nslog statements.
- Removing some commented out code
- Commenting out comments.
WhereOnEarth - Add extra cities & progress label

- Adding additional cities with identifiable features to our hardcoded
array for more questions.
- Adding a label to the quiz view that reflects “x of y” so that the
user has some indication of progress. (i.e. how many cities there are
and what question they are on).
- Fixing a bug in the showNextQuestion which was setting an invalid
range when generating the answer button index on which to put the
correct answer!
WhereOnEarth - Ensure landedView constructed once

- Renaming showLandedView to createLandedView.
- Adding new method updateLandedViewWithCityWebData  with extracted
code from showLandedView.
- This allowed us to then create all the elements on the landing page
once (in viewDidLoad), but update just the web view with the satellite
image of the current city.
WhereOnEarth - Non functional changes.

- Renamed createQuiz to createQuizView which is called from the
viewDidLoad to create this view with all its elements once up front.
- Some other non-functional changes.