Release v0.1.1

Summary

Zipkin exporter is moved from go.opencensus.io/exporter/zipkin to contrib.go.opencensus.io/exporter/zipkin

Complete list of changes since the move.

30f9fad Merge pull request #8 from rghetia/version
86f668e run go mod tidy
f6ff3dc Merge pull request #7 from alexamies/message_event_bytes
9f7049e Corrected unit test expected result
2c75f43 Added bytes sent and received to message event
c96617f Add installation and badges to readme. (#5)
e740601 Merge pull request #4 from rghetia/issue_template
286edef add issue template.
b42e210 Merge pull request #3 from rghetia/travis
9b74147 replace import with contrib.go.opencensus.io
c62f10d remove appveyor build.
d2112ff add travis and appveyor builds.
2425749 Copy zipkin exporter from go.opencensus.io/exporter/zipkin at commit id 75c0cca22312e51bfd4fafdbe9197ae399e18b38
951d5ab Initial commit