adding roll pitch yaw example, including processing.org sketch#4

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owennewo wants to merge 4 commits intoarduino-libraries:masterfrom

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Commits on Jul 28, 2019

adding roll pitch yaw example, including processing.org sketch
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Commits on Jul 29, 2019

suggested changes from pull request + moved processing,org example to processing folder as arduino editor was converting it to an ino
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Commits on Jul 30, 2019

moving processing to data folder
owennewo
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Commits on Jun 18, 2020

Reduce the possibility of divide by zero error.
owennewo
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