Cookie connector for Youtube

Added an option to send your browser's cookies to youtube-dl.exe as a CookieJar. This should allow you to download private and/or age-restricted videos if you are logged in to Youtube.

Retry jobs and quickly reconfigure settings

Added a button to retry failed jobs.

Added a WIP feature to name a group of settings (save in, format, template) and quickly load those settings from a dropdown.

Ask youtube-dl.exe to self-update

Added a button that will request youtube-dl.exe to self-update.

Initial release with native app

This is the first release with a native app for Windows included. Installation is moderately technical. See the wiki article for details.