v1.47.6: Update README.md, description and version update

This commit makes several small updates to the README.md file,
updates the description of the extension to include free/libre
and open-source software, and updated the version to
v1.47.6.

v1.47.5: Merge pull request #353 from podStation/enhancement__important-news-mv3

Updated to version 1.47.5

v1.47.4

Updated version to 1.47.4

v1.47.3

Merge branch 'master' of github.com:podStation/podStation

v1.47.2

Updated version to 1.47.2

v1.47.1: Merge pull request #303 from podStation/fix__boostagram-issue

Fix - boostagram issue

v1.47.0

Updated version to 1.47.0

v1.46.3

Updated version to 1.46.3

v1.46.2: Fix #290 - Error in deployment

This commit adds code to strip the comments from the locales files.
See https://github.com/podStation/podStation/issues/290
Chrome Web Store stopped accepting json files with comments
since our last release.

I'm processing the files now as json5 (see https://json5.org/),
a superset of JSON that allows comments.

v1.46.1

Updated version to 1.46.1