Translations:Release notes 0.20/130/en

The Addon Manager was modified to support the distribution of Preference Packs, and to display information found in an addon's metadata (for Workbenches and Preference Packs this is the package.xml file, and for macros it is the metadata embedded in the main macro file itself). The Addon Manager also includes improved support for Addons whose source code is located at four directly-supported hosting locations: GitHub, Gitlab, Framagit, and salsa.debian.org. Networking support was improved to provide more robust handling of SSL connections and support for proxies requiring authentication.