Updated: Moved extension internals into repostitory root

- Updated: Moved extension files into repository root for simpler extension checkout and use

Hello,

In this pull request we have moved the extension internals into the repository root to make the checkout process work cleanly by default without extra work or symlinks.

Details
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We recently had the need to run cronjobs via the admin and found your extension. Thank you!

We were pleased to find again your extension updated to work with the latest community release. The extension worked perfectly for us the first time with minimal configuration setup!

We were however disappointed to find that the extension has not been touched for 3 years.

We hope to help improve this with our first pull request!

We think that the extension internals belong in the repository root like almost every other ezpublish extension on GitHub (from eZ Systems, 3rd Party Vendors, Partners, Community Members, etc).

We have successfully had similar changes merged in the past by others in the eZ Community: https://github.com/dbteam/ezchangeclass/pull/1

Closing
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We think this pull request is important to help people be able to make quick use of the extension without needing to move the extension checked out around. Please let us know what you think.

Thank you for your continued support!

Cheers,
Brookins Consulting