lodash isEqual does not support functions

[TuningGuide]

isEqual always says false if object contains functions. Furthermore tinymce adds properties to the single items in the style_formats option.

I had to change the componentWillReceiveProps and shouldComponentUpdate to:

  componentWillReceiveProps: function componentWillReceiveProps(nextProps) {
    if (!(0, _lodashLangIsEqual2['default'])(this.props.config, nextProps.config, function(c1, c2) {
        if(typeof c1 === 'function' && typeof c2 === 'function') {
            return c1.toString() === c2.toString();
        }
        if(c1.hasOwnProperty('items') && c2.hasOwnProperty('items')) {
            return c1.length == c2.length;
        }
        })) {
        this._init(nextProps.config, nextProps.content);
        console.log('TODO: this._init(nextProps.config, nextProps.content);');
    }
    if (!(0, _lodashLangIsEqual2['default'])(this.props.id, nextProps.id)) {
      this.id = nextProps.id;
    }
  },

  shouldComponentUpdate: function shouldComponentUpdate(nextProps) {
    return !(0, _lodashLangIsEqual2['default'])(this.props.content, nextProps.content) || !(0, _lodashLangIsEqual2['default'])(this.props.config, nextProps.config, function(c1, c2) {
            if(typeof c1 === 'function' && typeof c2 === 'function') {
                return c1.toString() === c2.toString();
            }
            if(c1.hasOwnProperty('items') && c2.hasOwnProperty('items')) {
                return c1.length == c2.length;
            }
        });
  },

[SimonChris]

This can also be solved by declaring the functions outside the component, so that the same function object is reused every time.

See also #47 and #62.