Draft for release candidate v1.1.0

Drafting the v1.0.0

Prepare release v0.3.0 for summary changes (#25)

- Add objectives to summaries through struct tag and set default values when none specified
- Upgraded client_golang to v1

Merge pull request #19 from cabify/use-shorter-list-of-buckets-as-def…

…ault

Shorten default list of buckets

Updated CHANGELOG for v0.2.0 release

Added CHANGELOG.md

Initial release

Initial release