SecurityPolicyDsc: Move Change Log to CHANGELOG.md and Add Build/Code Coverage Badges

[X-Guardian]

Pull Request (PR) description

To conform with other Dsc GitHub repositories, this PR moves the change log to a separate CHANGELOG.md file and adds AppVeyor Build and Code Coverage badges for the master and dev branches to the README.md file.

The PULL_REQUEST_TEMPLATE.md file has also been updated with the new location of the change log.

This Pull Request (PR) fixes the following issues

None

Task list

• [x] Added an entry under the Unreleased section of the change log in the README.md. Entry should say what was changed, and how that affects users (if applicable).
• [ ] Resource documentation added/updated in README.md.
• [ ] Resource parameter descriptions added/updated in README.md, schema.mof and comment-based help.
• [ ] Comment-based help added/updated.
• [ ] Localization strings added/updated in all localization files as appropriate.
• [ ] Examples appropriately added/updated.
• [ ] Unit tests added/updated. See DSC Resource Testing Guidelines.
• [ ] Integration tests added/updated (where possible). See DSC Resource Testing Guidelines.
• [ ] New/changed code adheres to DSC Resource Style Guidelines and Best Practices.

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This change is 

[codecov-io]

Codecov Report

Merging #133 into dev will not change coverage. The diff coverage is n/a.

@@        Coverage Diff         @@
##           dev   #133   +/-   ##
==================================
  Coverage   89%    89%           
==================================
  Files        5      5           
  Lines      498    498           
==================================
  Hits       447    447           
  Misses      51     51

[X-Guardian]

Can someone review this PR?

[X-Guardian]

Hi @johlju, are you able to finish the review of this PR?

[johlju]

Yep, I can, but later this week I hope I can get to it. 🙂

[X-Guardian]

Cheers, that's great.

[X-Guardian]

Hi @johlju, are you able to finish the review of this PR? I have another bigger PR that greatly improves the documentation in this module that I will submit once this is merged.

[johlju]

Sorry, it is not forgotten. I added a bunch of issues in xWebAdministration for hacktoberfest and it has been crazy there with PR's. Last weekend was to busy with family stuff. But I will get to it this weekend I promise! 😄

[johlju]

I flagged the e-mail notification so I don't forget! :)

[X-Guardian]

Cheers @johlju, no worries!

[johlju]

@jcwalker or @gaelcolas can you please merge this one?