Silence "delay won't work" messages when compiling using -O0.
Bring "features" file up to date.
Changed some #defines into enums.
Lower programming delay.
Prevent syntax error when line is terminated with \n (telnet).
Add watchdog reset while reading frame from / writing frame to enc (lengthy).
Remove "commands" section which is not going to implemented.
Reorder pin overview.
Remove timer0 and timer2 which aren't going to be used.
Remove unused enums.
Replace simplified pin overview by full pin overview.
Configure all ports explicitly (DDR).
Cosmetic.
Add led's for i2c and spi activity.