update changelog version to match release version
Merge remote-tracking branch 'public/master'
Add in methods to manage, validate and manipulate X-Trace IDs
Load Oboe::XTrace
Validate returned X-Trace IDs on net::http responses
Move Context and task collection higher and remove debug log
Method documentation for Oboe::XTrace
Make XTrace validation case insensitive
Test coverage for the new Oboe::XTrace module
Attempt to fix broken Cassandra service on Travis (again)
Remove env.sh test and increase sleep
Attempt Cassandra fix per:
https://github.com/travis-ci/travis-ci/issues/1053
Re-enable stock cassandra
Disable Cassandra tests until TravisCI resolves their issues
Move debuggers to development group and avoid bundling debuggers in TravisCI
Don't test exact hash value since to_json hash ordering varies between 1.8.7 and 1.9+
Up version to 2.3.4
Update 2.3.4 CHANGELOG
Better referencing of X-Trace from Array
Add net::http tests against instrumented and non-instrumented targets