Currently when you change the settings in src/client/index.js of the distro, these will not be transitioned because users might have local settings stored.

By adding support for a revision number these settings could be reset automatically easily (simply load core settings on login instead of the user ones).

Also, adding support for custom migration scripts would be pretty neat so no custom settings would be lost.

• Add revision config option
• Implement revision override
• Add migration script API

Ref: #76