make knack header monocols

knacks.tex

@@ -2,14 +2,10 @@
 \label{knacks}
 \index{Knacks}
 
-\begin{multicols}{2}
-
 \noindent
 Characters can individuate themselves by learning various Knacks -- special talents for combat manoeuvres, magic, skills or other abilities.
 Most people can pick up a couple of Knacks easily but further Knacks become progressively less intuitive.
 
-\end{multicols}
-
 \section{Combat Knacks}
 
 \begin{multicols}{2}