Added unit tests for the images and text Wallpaper place methods
Merge branch 'master' of github.com:enmiller/Wallpaper
Merge branch 'master' into yay-swift

Conflicts:
	Wallpaper-Demo/Wallpaper-Demo/WPSecondViewController.swift
	Wallpaper/Wallpaper.swift
Adding more tests?
Renaming struct method for readability