add plugin for others 1-wire probe

[tparvais]

Hello

I'm ready to adapt DS18B20 plugin to some others Dallas 1-wire plugin (DS2438 & DS 2423 counter) but the existing code for DS18B20 sounds too complex for me . I would need more comments in code.

Reading a value for counter instead of temperature should not be too complex.

Is there possibility to have more comments on the existing temperature Dallas plugin code ?