Improved support for HTTP Basic Authentication
Extended DownloaderFactory to support optional username & password parameters.
Extended HttpDownloader to check for HTTP 401 Authorization Required status code
and send a simple HTTP Basic Authentication header with all requests.
Extended ManageReposActivity to support repositories that use HTTP Basic
Authentication, added a dialog to prompt for username and password.
Extended RepoDetailsActivity to be able to display and modify the authentication
credentials.
See merge request !171
b9342e909b