Partway through switching instruction formats
Finished with this instruction format refactoring.  No stall state is necessary in the core anymore, (but a drop must be inserted by the assembler after a "store"
Added equality opcode.  Assembler can now use names for memory locations
Replaced 1branch with CALL instruction
Call and return are not working properly
Still working on call/return
Fixed call and return; bug was in stall state