add new scamper source code

[yachang]

This change is 

[pboothe]

Approved after an in-person conversation. The plan is to have a followup PR that does the deletion and migration.

[coveralls]

Pull Request Test Coverage Report for Build 55

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.8%) to 99.213%

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Files with Coverage Reduction	New Missed Lines	%
connectionwatcher/connectionwatcher.go	2	97.92%
<!--	Total:	2		-->

Totals
Change from base Build 51:	-0.8%
Covered Lines:	252
Relevant Lines:	254

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💛 - Coveralls