Merge pull request #1 from jdiez17/master

z80e now compiles properly
Renamed some things, added I and R registers
Added ASIC files
Fix compile issues
Add modular MMU support
Edit cmake info
Fix segfault and modify state struct
Modified MMU slightly
Create README.md
Update README.md
Remove main.h
Merge branch 'master' of https://github.com/KnightSoft/z80e
Implemented basic MMU features, added hardware I/O scaffolding
Remove test device
Fixed address to bank mappings in memory, started on z80 emulation
Instruction decoding, some decoding tables
Flesh out instruction decoding and flags
Add tests
Fix issue with cycle counting
Add cycle check to tests