Provides two functions 'frameableWidget()', and 'frameWidget()'.
The 'frameableWidget()' is used to add extra code to a 'htmlwidget' which
allows is to be rendered correctly inside a responsive 'iframe'.
The 'frameWidget()' is a 'htmlwidget' which displays content of another 'htmlwidget'
inside a responsive 'iframe'.
These functions allow for easier embedding of 'htmlwidgets' in content management systems
such as 'wordpress', 'blogger' etc.
They also allow for separation of widget content from main HTML content where
CSS of the main HTML could interfere with the widget.