Move to option 'ignoreWhitespaces'

closes #69 
```javascript
exports.defaults = function(options) {
    vart mergedOptions = _.defaults(options || {}, {
        ignoreHtmlAttrs: [],
        compareHtmlAttrsAsJSON: [],

        ignoreWhitespaces: true,
        ignoreHtmlComments: true,

        bem: false
    });


    if (mergedOptions.hasOwnProperty('ignoreWhitespace')) {
        console.log('WARNING! Option \'ignoreWhitespace\' is deprecated, please, use \'ignoreWhitespaces\''.bold.red);
        mergedOptions.ignoreWhitespaces = mergedOptions.ignoreWhitespace;
    }

    return mergedOptions;
};
```