Shorten exported output by returning object directly
Update module.exports for export.js
Update exportGrammar() to receive a grammar object

This allows raw JSON data to be imported instead of relying on a Vue
ViewModel object:

    // export raw grammar (vm.$data) as pretty-printed JSON
    var rawGrammar = JSON.stringify(vm.$data, null, 4)

    // export grammar as compressed JS from JSON object
    var exported = exportGrammar(JSON.parse(rawGrammar))
Create numbered sections with placeholders
Finalize base design