x86_64 is used as a baseline: the "x86_64" entry, whatever status it has,
is transformed into "all", and then the other entries in ARCHITECTURES
either dropped or rearranged appropriately.
* Move pipepanic from games-kids to games-puzzle to follow Gentoo.
* Put pipepanic.rdef in additional-files instead of the patch file.
* Call addResourcesToBinaries instead of rc and xres.
* Reorder sections, fix COPYRIGHT, enable x86_64, drop cmd:xres from
BUILD_REQUIRES, add cmd:{sdl_config,install,cut} to BUILD_PREREQ.
* Install README and do some polishing in BUILD and INSTALL.
waddlesplash