#22 ADC does not work with successive approximation

[Nicolas]

The AD converter module used in all supported pics does
not work exactly as described in the datasheet.
It is not based on a successive approximation. This
implies -that if the result is read before the end of
the minimal conversion time, 0 will be read.
- it is not possible to perform undersampling.

This problem will be fixed in the next release (0H)