Implement Open/Close Event

[dvonthenen]

Proposed changes

Addresses issue: #187

Implements Open/Close events along with a Raw Unhandled event message when you have access to raw bytes. This could be useful for wanting to handle messages that aren't implemented yet.

Updated all examples to make use of the Open/Close event. The Unhandled event wont trigger until we have a new event that is introduced that this SDK doesn't handle (ie you should not see this event at all).

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update or tests (if none of the other choices apply)

Checklist

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• I have read the CONTRIBUTING doc
• I have lint'ed all of my code using repo standards
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

NA