improved examples in readme file, added instance methods
improved examples in readme file, added instance methods

dellax/django-files-widget,dellax/django-files-widget,interisti/django-files-widget,interisti/django-files-widget,alexander-gridnev/django-files-widget,alexander-gridnev/django-files-widget,alexander-gridnev/django-files-widget,interisti/django-files-widget,dellax/django-files-widget