v0.7.4

• Initial release on npm
• (app) Improved sign in/first run form
• (app) Added About panel with version and licenses
• (app) General style improvements
• (server) Improved field validation and error messages
• (server) Songs/artists without known media are no longer removed automatically after scan
• (server) Media in nonexistent paths are now removed after scan
• (server) Replace dep squel with sqlate