Add in new special frames
Clean up the createImageFolder.php script. This trys to create the directory to store the images in, fails if a file exists of the same name, validates the url to prevent false error messages, switches to a single updating progress indicator, dont redownload existing images, and display the url on a problem to download rather then fail without information.
Fixes #43, this allows navigation by clicking in the preload indicator.
Fixes 8c696749f785f46d6385fabfa1f780221e8c444c by setting the slider value correctly when selecting a frame