.gitignore: add Hexfiles/build folder
slave_eeprom_mapping.h: correct comment
slave_main:
- remove handlePort
- modify comments
- change on/off on switch functionality
- change on/off on pulse functionality
- change on/off on read functionality
slave_config.h:
- change virtual IO in mapping
move to common git repo:
- function codes
- handle/read virtual IO functions
- bit access macros

modiy main loop for new IO function handling
add common_AVR submodule
remove twislave backup
enable 16bit address support
commo_AVR makefile modifiations
add git-version
update mapping
use new mapping
change constant buffer_size > BUFFER_SIZE
update slave_config
update mapping
move 230V2LED -> addon dir
- BUFFER_SIZE -> I2C_BUFFER_SIZE
- add debug macro
- add uart for debug usage
- add main debug macro
- add printIOsstruct/handle_vio functions
update submodule common_AVR