ECMA6 Support

[ivanstan]

So far ECMA6 documentations generated are pretty satisfactory, except for class that has constructor. In such case title of class will be generated twice, once for class and second time for constructor. It would be nice if we could support this in future.

Here is the class and output for such usecase:
https://github.com/ivanstan/frontend-framework/blob/master/core/Controller.js
https://github.com/ivanstan/frontend-framework/blob/master/module/example/assets/docs/Controller.md

[psq]

thanks for the details.