Serial Support

[Artucuno]

(Reopened #337)

• Merged changes from master branch
• Working implementation of Serial

Tested in:

• Pokemon Yellow (WORKING)
  • Trading
  • Battle

Issues:

• There is a small issue where the emulator will temporarily freeze when waiting for the other Gameboy to respond to data (Should be an easy fix for someone) - Fixed in 7878718 & fa3eaaa
• Synchronization issues in some games, however Pokémon games work completely fine. Fixed in fa3eaaa
• When compiled into Cython, PyBoy freezes after socket connection is established Fixed in fa3eaaa
• GBs will only use the internal clock

[Baekalfen]

Very interesting work! Could you rebase this instead? I can't tell exactly which changes are yours and which are from the merge commit.

Also, you seem to change some of the formatting in the files. You should use pip install pre-commit && pre-commit install and let that take care of the formatting.

[beardyFace]

@Artucuno how do I test/use the serial connection through pyboy with these changes?