Remove all unreferenced files
Restore some icons and launch images
Remove unused activity image
Remove old sidebar code and images
Move all images to Images directory
Moved a few lingering images
Move all images to an Asset Catalog
Merge branch 'develop' of github.com:wordpress-mobile/WordPress-iOS into issue/1868-cleanup-images

Conflicts:
	WordPress/WordPress.xcodeproj/project.pbxproj
Merge pull request #1869 from wordpress-mobile/issue/1868-cleanup-images

Issue/1868 cleanup images