code: function parseKV(obj) {
    return _.map(obj, function(v, k) {
      v = _.isString(v) ? v : JSON.stringify(v, null, 2)
      return k + ': ' + v
    }).join('\n')
  }
docs: ///////////////////////// built-in transformers // ///////////////////////// 
  Parse a JSON object into array to ['k: v', 'k: v'], where v is attemptedly stringified.
  @param  {JSON} obj Object to parse
  @return {Array}     of strings like ['k: v', 'k: v']
  
  var obj = {
  a: 1,
  b: {c:2}
  }
  parseKV(obj)
  // => 'a: 1\nb: {\n  "c": 2\n}'