Slave.h is included only if MASTER is declared
Added flags comments
Only include EEPROM library if USE_EEPROM Flag is defined
Deleted TODO text.
Deleted useless flags ReceiveEvent & RequestEvent
Moved include EEPROM to Firmware.ino due to certain errors
Do not star or load I2C if Master or Slave Flags are not defined
Do not create SizePWM if PWM_CONTROL Flag is not defined
Do not create _PWM if PWM_CONTROL Flag is not defined