Simple columns
--------------

.. r2b-simplecolumns::
    :width: 0.95

    .. image:: plot.png
       :width: 130%

    
    * bullet 1
    * bullet 2
    * bullet 3


Explicit columns
----------------

.. r2b-columnset::
    :width: 0.95

    .. r2b-column::
        :width: 0.75

        .. image:: plot.png

        
    .. r2b-column::
    
        * bullet 1
    	* bullet 2
    	* bullet 3

    
    
A slide without columns
-----------------------

Just to make sure our "columnization" isn't persistent, this should show up
up as a plain normal slide.