Update README.md

[larrytalley]

very minor spelling correction

[coderextreme]

I wonder if people have thought of chaotic or mixed grammars, where the grammar mixing is governed by some set of equations. I know about embedding languages. I am referring to changing the language through chaos or mixture, and the governing equations still allow you to make sense of the language, compile it, etc. Probabilistic grammars are only the first step… John