Updated golang to 1.14 in Dockerfile

Added new funcionality to README

Preparing release 0.6.1

Added date to 0.6.0 release in CHANGELOG

Bumped version v0.5.0; Updated CHANGELOG.md with release notes

Preparations for v0.4.0 release

Preparations for 0.3.0 release

Preparations for release 0.2.0; Bumped version and updated CHANGELOG.md

Fixed typo in README.md