Added Advance Modpack Info GUI to show files that needs downloading or are marked for removal. Closes issue #2
Added new assests to be downloaded for the AdvInfo GUI (background)
Fixed background resizing issue (new backgrounds for all GUI's thats the same size as the GUI) Closes issue #3
Fixed Update_Helper trying to log info to file while it has no file handle to the log file
Updated Updated_Helper to use SHA1 hash instead of md5