- removed most of lodepng's optional features
- lodepng now uses the already existing CRC32 code instead of using its own copy
- fixed GIC interrupt priority
* extrcode already existed, but now has a progress bar and an entry in HelloScript.
* cmprcode recompresses a code binary into its original format. It takes 2-3 minutes.
* cp -p appends file 2 to the end of file 1 rather than overwriting it.