Support for tinyAVR 0-series (tiny202 etc)

[tomek-szczesny]

Hi,
Encouraged by similar request #34 I decided to add a new issue. I'm looking forward to create a new design using attiny204 (alas, nothing else is left on Mouser!).

I'm assuming that 0-series should be even more similar to "classics". I wonder what needs to be done to make them work - apart from adding them to device.c.

Once I put my hands on one of these, I'll give that a try, but nevertheless some input from @Ro5bert would be greatly appreciated. :)

[Ro5bert]

I think my first comment from #34 pretty much applies here as well. I expect it will just work once you add a line to device.c. In any case, let me know what happens.