added conditional compilation for PWMs 1C & 3C
add Teensyduino compatibility
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changes per review - minor formatting changes
1) remove non-printable character at the end of line 687
2) split a really long comment into two lines
3) got rid of some trailing spaces
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Made pinsDebug_Teensyduino.h the same between this PR and PR 5668 which
is for a re-written pinsDebug.h file.
The changes were:
1) added copyright @ GNU license header
2) a blank line crept in.
