2.0-rc1

• Add refiners to enrich videos with information from metadata, tvdb and omdb
• Add asynchronous provider search for faster searches
• Add registrable managers so subliminal can run without install
• Add archive support
• Add the ability to customize scoring logic
• Add an age argument to scan_videos for faster scanning
• Add legendas.tv provider
• Add shooter.cn provider
• Improve matching and scoring
• Improve documentation
• Split nautilus integration into its own project