Add new default splash logo

Add 5th anniversary splash screen

Readme updates

fix installing from CDN files

GM9Megascript: Move payloads when moving Luma

copy luma/payloads, and remove the unneeded `-a` in the allow command because only lvl 1 perms are needed here

Don't show the JEDECID file on carts that have none

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