v0.34.1

Primary changes:

• Forcing a new release as there were some timeouts to bintray for 0.34.0. The
  artifacts for 0.34.0 appear to be ok, but just to be sure it is recommended to
  avoid it and use 0.34.1 instead.
• Add prefix to distinguish timer and distribution summary percentile counters.

A comprehensive list of changes can be found in the commit log: v0.34.0...v0.34.1