Add 4-trit sign detector, rename 3-trit one to tsign3.
treecd35d7173968a2388ccbc8430168ae6f4700420d
-rw-r--r-- 32 .gitignore
-rwxr-xr-x 237056 Spring 2008 Schedule.mpp
drwxr-xr-x - asm
drwxr-xr-x - bb
drwxr-xr-x - circuits
drwxr-xr-x - digital_simulator
drwxr-xr-x - tools