scrapped most of libsrc, restructured code

src/Makefile

src/libsrc/Makefile

src/libsrc/MakefileOG

src/libsrc/bwio.a

src/libsrc/bwio.c

src/libsrc/bwio.o

src/libsrc/bwio.s

src/libsrc/scheduler.c

src/libsrc/task-descriptor.c