Update Readme/Changelog for release

  - Change the clearly outdated things in the README file
  - Update Changelog with the release date/version

spelling fixes, grammar adjustments, and moving license to the top.

fixing official documentation stanza
Merge branch 'claco-readme-changelog-release-fix' of github.com:jcannava/ansible-lxc-rpc into claco-readme-changelog-release-fix