cw4: Import Marc's assets
cw4: Fix missing namespace
Add separate source files for safe and fib
cw4: Import cw3 EU and ALU implementations
cw4/ucasm: Don't require .s file extension
cw4: make sim assembles ram.asm
cw4: Use decimal addresses in annotations
cw4/stdlib: Fix button routine tests
cw4/fib: Explicitly disable interrupts
cw4: Update sim view