Byte vectors are now working. They can only be created at runtime yet,
tree2b89d446b8a0c65b7b5b4187b1c100a6cb833962
-rw-r--r-- 10229 library.scm
-rw-r--r-- 62964 picobit-vm.c
-rw-r--r-- 104724 picobit.scm
-rw-r--r-- 388 red-green.scm
-rw-r--r-- 31589 robot.scm