revC: Fix a glitch

revC: use proper footprint for I/O connectors, tweak silkscreen

arch.boneless: renumber I-class opcodes to group better. Now, all code=1xx opcodes except LDI/STI read from Rs (and ADDI/SUBI writes to Rd), and all code=0xx opcodes only write to Rd.

revC: restore Glasgow label text Got lost somewhere...

gateware.boneless: implement M-class instructions.

gateware.boneless: implement A-class, S-class and C-class insns. No tests for C-class yet.

revC: silkscreen wrapup, add Hana

arch.boneless: add assembler with labels.

arch.boneless: make sure NOP is 0x0000.

arch.boneless: new architecture (Boneless v2).