EnviroDIY/ModularSensors: Minor Bugs and Simplified Debugging

New Features: Gave every header file a unique debugging define statement so each file can be debugged individually by building with the build flag -DMS_xxx_DEBUG where xxx is the file name in upper case. Some files also have a "deep" debugging option with -DMS_xxx_DEBUG_DEEP Created examples for LearnEnviroDIYCode Bug Fixes: Fixed a bug causing modem to not be turned because the processor thought it was on already Corrected warm-up timing for Yosemitech Sonde Typo fixes in comment