\usepackage{graphicx} % Graphics
\usepackage{epstopdf} % Eps graphics
\usepackage{todonotes} % Todo notes
+\usepackage{etoolbox} % Todo notes
+
+%\patchcmd{\chapter}{plain}{headings}{}{}
+\patchcmd{\chapter}{plain}{headings}{}{}
\usetikzlibrary{arrows,shadows}