Added third anniversary edition splash

Allow handling of DLC CIAs with up to 1000 contents

Also include derreks sighax signature

in the source, currently not used

Fix PNG viewer for 400x240px files

Fix a critical bug

Anniversary edition splash screens

Added ability to extract data from DIFF files

Moved sample scripts to their own directory

Included HelloSpaghetti script in the readme

Fix typos in readme file