v0.21.3: 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 comments