Adding icons
After logout, taking the login page.
Keeping the same dynamic image to the user
Updating icons
Make the close button smaller
Add a user profile image to the story detail header and story list views
Set the 2x version for the settings icon in the assets catalog
Merge pull request #36 from danschultz/add-profile-image-to-header-view

Add profile image to header view
input validation
input validation
Removing default text in TextView
Adding new image for home page
Organize the storyboard elements
Add a profile image to the storyline table view cells
Add a favorite button to stories

This adds a button to favorite a story. Popular stories are now sorted by the
number of favorites they have.
Merge pull request #37 from danschultz/favorites

Add a favorite button to stories
Changing the default text in Story Description
Fix issue where scrolling the stories list gets progressively slower

Issue is a result of arrays in Swift being passed by value. Removing the
observer would not remove the observer from the originating list.

Closes #39
Remove old background image before loading new image when scrolling stories
Increase size of close button