MU-5 Added beans for extensions processing.
MU-6 Added extensions updates fetcher.
MU-7 Added extensions storage.
MU-8 Added versionCheck route for extensions, as a blocking proxy for now.
MU-14 Added an endpoint to upload an extension.
MU-15 Added an install.rdf parser.
MU-15 An uploaded extension is copied to file storage.
MU-4 Added validation of extension beans.
MU-16 Uploaded extension's metadata is stored in the database.
MU-15 Now computing checksums of uploaded extensions
MU-17 Extension update route
MU-23 Added the extensions scraper
MU-24 Added API endpoint to list extensions.