- moved to new port structure
- rewrote startup code
- added implementation dummies for UART and timer
- switched to atmel linkerscript
- cleaned up Makefiles
This PR converts tabs to white spaces.
The statement I used for the conversion:
```find . -name "*.[ch]" -exec zsh -c 'expand -t 4 "$0" > /tmp/e && mv /tmp/e "$0"' {} \;```
Afterwards, I had a quick overview of the converted files to prevent odd indentation.
