243 rabbitmq adaptor

[jipperinbham]

adds a RabbitMQ adaptor for consuming/publishing

• CHANGELOG.md updated
• README.md updated
• add SSL tests

fixes #243

[codecov]

Codecov Report

Merging #298 into master will increase coverage by 0.58%.
The diff coverage is 86.93%.

@@            Coverage Diff             @@
##           master     #298      +/-   ##
==========================================
+ Coverage   80.06%   80.64%   +0.58%     
==========================================
  Files          43       47       +4     
  Lines        2307     2480     +173     
==========================================
+ Hits         1847     2000     +153     
- Misses        326      337      +11     
- Partials      134      143       +9

Impacted Files	Coverage Δ
adaptor/rabbitmq/rabbitmq.go	100% <100%> (ø)
adaptor/rabbitmq/writer.go	100% <100%> (ø)
adaptor/rabbitmq/client.go	100% <100%> (ø)
pipeline/node.go	76.28% <58.33%> (-1.27%)	❌
adaptor/rabbitmq/reader.go	73.52% <73.52%> (ø)
pipeline/pipeline.go	58.24% <0%> (+2.19%)	✅

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[jipperinbham]

publisher confirms was left out for now until we have a way to track messages processed internally

this change also updated to go 1.8 and fixed a bug pipeline/node.go introduced in #290 where the namespace filter function was not getting passed to the Read() function.