Add a command to install the extension media of an extension

Review Request #7627 — Created Sept. 13, 2015 and submitted — Latest diff uploaded

Information

Djblets
master

Reviewers

Previously, there was no way to install the media of an extension
outside if its intsall procedure. Now there is a management command,
install-extension-media, that will install the extension media of an
extension. This behaviour can be forced (e.g., if the extension is
already installed) with the --force option. Either a single
extension's media will be installed (if --extension-id is provided),
or the extension media of all extensions will be installed.

Installed the extension media for a single extension and all enabled
extensions. Verified --force forces installation.