code: function(argumentName, defaultValue) {
        var result = argMap[argumentName];
  
        if (this.isEmpty(result) && this.isNotEmpty(defaultValue)) {
          if (typeof defaultValue === 'object') {
            result = defaultValue[argumentName];
          } else {
            result = defaultValue;
          }
        }
  
        return result;
      }
docs: Return the commandline argument specified by argumentName. If not found, then return the specified defaultValue.
  
  Example commandline:
  "tessel run app/app.js climatePort=A foo=1.23 bar=4.56"
  
  Example Usages (for the commandline shown above):
  // returns "1.23"
  tesselKit.tesselUtils.getArgumentValue("foo", "asdfgh");
  
  // returns "qwerty"
  tesselKit.tesselUtils.getArgumentValue("test", "qwerty");