Changes in version 0.3 (2017-06-02)                   

    o   Fixed horrible bug discovered by Aaron Rendahl where when some
	variable names were substrings of other variable names not all
	models were searched.
	
	This could have been avoided if I had remembered the famous
	quote by Jamie Zawinski: “Some people, when confronted with a
	problem, think ‘I know, I'll use regular expressions.’ Now they
	have two problems.”

    o   Now AICc == Inf when n <= p + 1.

    o   Now error when AIC(out) is when out is output of R function
	glm.

                  Changes in version 0.2 (2016-04-17)                   

    o   Added graphical models.  Now can search only over graphical
	models.

                  Changes in version 0.1 (2016-04-13)                   

    o   First submission to Github.  Does all hierarchical models.