improve the list abstraction with "struct list_head" and "struct list"

both structs are actually just uint32_t's in disguise, using bitfields
to avoid the need for explicit bit operations, and using two type names
to hide the RAZOR_IMMEDIATE hack from the public API

.gitignore

*.o

*~

*.repo

razor

test-driver

pkgs

set

primary.xml.gz

filelists.xml.gz