rustotto: fix display timer

Add 'test_opcode.ch8' rom from github.com:patsie75/awk-chip8

rustotto: fix

- ADD Vx, byte
- SUB Vx, Vy
- SNE Vx, Vy
- LD [I], Vx
- LD Vx, [I]

add some missing ';'

Fix c8deasm

rustotto: get rom from cmdline, fix vregs sum/sub

Fix c8deasm

rustotto: limit loop fps

pycippotto: please linter and mypy

c8asm: Fix bug

Rust implementation

Fix c8asm.py for new extensions

add Pipfile and editorconfig

raycippotto: file argument is now optional

please linter

File browser: scroll view

Fx0A - if no valid key is read
keep the PC on instruction and end the step

please linter more

don't run if not ready

Please linter

raycip8: try to add a file browser