Jsclient + Node client

[pboothe]

Converting the js client to one with a cleaner interface that also works with node.js

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This change is 

[coveralls]

Pull Request Test Coverage Report for Build 1303

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• 6 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.03%) to 80.0%

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Files with Coverage Reduction	New Missed Lines	%
ndt5/c2s/c2s.go	1	72.32%
ndt7/upload/sender/sender.go	5	67.65%
<!--	Total:	6

Totals
Change from base Build 1299:	0.03%
Covered Lines:	1656
Relevant Lines:	2070

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💛 - Coveralls