Flatten extension to the root path

[smalluban]

Flattening was split into separate commits:

• The first one contains files that have been changed - mainly the configuration files from the root and README
• Rename of the source files - no change in the code
• Additional fixes if required

Please check out the updated README.md, as I combined them both, and added a part of the description from the Chrome Web Store. Any comments are welcome on that.

[github-actions[bot]]

Builds for commit e76005e37b9eb0c654625f55b4492264f3e604e9:

• ghostery-chromium-10.4.7-e76005e
• ghostery-firefox-10.4.7-e76005e

[github-actions[bot]]

Builds for commit cb2192adca1879a57f385a0da73ec705bf037d37:

• ghostery-chromium-10.4.7-cb2192a
• ghostery-firefox-10.4.7-cb2192a

[github-actions[bot]]

Builds for commit 869ba6ea8ae5abbc001cf69e32fad48079292b1a:

• ghostery-chromium-10.4.7-869ba6e
• ghostery-firefox-10.4.7-869ba6e

[github-actions[bot]]

Builds for commit 1ee6cfe4b2a7d2e021319e48cb093b2935d82994:

• ghostery-chromium-10.4.7-1ee6cfe
• ghostery-firefox-10.4.7-1ee6cfe