Added categories and images
Implemented narrative images. They display in a popup at the beginning of levels 1, 5, and 9.
Fixed bug where narrative is displayed after completing level and closing popup.
Tweaked parameters, updated one image to have labels on it
Replaced previous images with Kate's updated labeled images.
Merge branch 'develop' into feature-pidding-monsters-upgrade
Resolved some storyboard conflicts
Merge branch 'develop' into feature-implement-narrative
Changed max lives to a constant
Merge pull request #67 from zsweedyk/feature-pidding-monsters-upgrade

Added categories and images
Added launch images

Note: Not yet tested. Vincent, please test.
Fixed bug where narrative was no longer shown when pressing "Next Level" from levels 4 or 8. This bug was because recent changes on develop relating to the segues from the end of level view controller (actually, the style with which it was presented) made it so dismissing that view controller no longer calls the viewDidAppear method.
Updated splash images to be a screenshot of the menu with the buttons and bottom icons removed.
Merge pull request #77 from zsweedyk/feature-SplashImages

Added launch images
Merge pull request #69 from zsweedyk/feature-implement-narrative

Implemented narrative images. They display in a popup at the beginning o...
Styled end of level view controller's "Next Level" button and tweaked layout.
Tweaked x button.
Merge pull request #79 from zsweedyk/feature-endlevel-tweak

Styled end of level view controller's "Next Level" button and tweaked layout.
Merge branch 'develop' into feature-improved-instructions