1. Fix processing of message 0x3A
2. Fix Temperatures to have no decimals, otherwise they will not convert correctly between C/F.

Removing the Temp to Prec0 conversion,  it will be handled properly by another PR.

Optimization on Traversing the sensor table. Since the table is sorted by the message i2cAddress,  once we are past that sensor, we can stop.  TODO: Future optimization: create an index to get to the start of the sensor in the table much faster.