Merge pull request #275 from tracelytics/master

Public Repo RC 2.3.3.7 Changes
Merge pull request #278 from tracelytics/master

Release oboe-ruby 2.3.4
Merge remote-tracking branch 'origin/master' into prod
Merge pull request #280 from tracelytics/master

Release oboe-ruby 2.3.4.1 (Patch)
Slightly simplified get_multi_with_oboe method
Cleaned up cache_get and request_setup methods.  Remove duplicated code.
Moped instrumentation cleanup: better returns and exception handling
Remove unnecessary duplicate block
.try is a part of Rails and may not be available depending on stack
perform and get_multi cleanup and refactor.
Better method wrapper pattern.
A better method wrap pattern.
Fix block logic.
Break out text copy to separate private methods.
add config to blacklist tracing of actions
Add json as a runtime dependency
Merge pull request #14 from nathantsoi/master

add config to blacklist tracing of actions
Add redis to the instrumentation list and set defaults.
Add references to template re: redis instrumentation
Empty Redis instrumentation file.