Added some debug/analysis code to EfergyRPI_log.c to help with new devices.

I've been using EfergyRPI_log.c to try to decode transmissions from a new Efergy Elite 3.0 TPM device.  The Efergy TPM seems to send 9 bytes and even adjusting for message size.

I wrote some debug/analysis code to help with analyzing the rtl_fm sample data in more detail.

The debug code might be helpful for figuring out decoding for newish devices or for debugging problems with RTL-SDR dongles that aren't behaving well.

I just remembered that I left some #defines set to values suitable for the Elite 3.0 TPM (eg VOLTAGE =1), so you might want to change those back if you do accept the pull request.