[Simulavr-devel] Rewrite of analog peripherals

[ThomasK]

Hi,

I've now added to master branch a rewrite of analog comparator and ADC 
to fit the most functionality used in the allready implemented devices.

In the moment, auto trigger functionality for ADC isn't implemented, 
except free running mode. This is because of some unclear descriptions 
in datasheets (especially, which timer and which OCR unit trigger ADC 
conversion)

cu, Thomas