give rules unasterisked headers

Standard headers fit in tcposter boxes without complaint.

rules/actions_basic.tex

-\subsubsection*{Dangerous \& Difficult Actions}
+\subsubsection{Dangerous \& Difficult Actions}
 
 Dice rolls describe the state of the world, so if the first player rolls a `6' to open a stuck door, all subsequent players must use the same roll to open the door.
 

rules/actions_resisted.tex

-\subsubsection*{Resisted Actions}
+\subsubsection{Resisted Actions}
 
 \begin{itemize}
   \item

rules/actions_resting.tex

-\subsubsection*{Difficulty at Rest}
+\subsubsection{Difficulty at Rest}
 
 \begin{itemize}
   \item

rules/attributes.tex

-\subsubsection*{Attributes}
+\subsubsection{Attributes}
 
 \begin{itemize}
   \item

rules/weapons.tex

-\subsubsection*{Weapons}
+\subsubsection{Weapons}
 
 Weapons add to Attack and Damage.
 Heavier weapons have bigger Bonuses, but pay dearly through their \gls{ap} cost.