pdf: escape dollar sign in lstlistings

fixes #106

pdf/en-us/Makefile

@@ -13,7 +13,6 @@ pdf: markdown
 	@echo "Compiling PDF file..."
 	pandoc -f markdown+smart -s $(filename).md -o $(filename).pdf \
 		--title-prefix $(title) \
-		--listings -H meta/cpp-listings.tex \
 		--template=meta/template.tex \
 		--pdf-engine=`which xelatex`
 	@echo "Done."

pdf/en-us/meta/cpp-listings.tex

@@ -1,26 +0,0 @@
-
-\usepackage{xcolor}
-
-\definecolor{keyword}{HTML}{BA2CA3}
-\definecolor{string}{HTML}{D12F1B}
-\definecolor{comment}{HTML}{008400}
-
-\lstset{
-  basicstyle={\small\ttfamily},
-  keywordstyle={\color[rgb]{0.13,0.29,0.53}\bfseries},
-  breaklines=true,
-  emphstyle={\bfseries\color{Rhodamine}},
-  commentstyle={\color[rgb]{0.56,0.35,0.01}\itshape},
-  stringstyle={\color[rgb]{0.31,0.60,0.02}},
-  showstringspaces=false,
-  frame=shadowbox,
-  breakatwhitespace=false,
-  captionpos=b,
-  extendedchars=true,
-  keepspaces=true,
-  numbers=left,
-  numberstyle=\tiny,
-  rulecolor=\color{black},
-  rulesepcolor={\color{blue!20!white}},
-  showspaces=false,
-}

pdf/en-us/meta/template.tex

@@ -47,9 +47,7 @@ $if(biblio-files)$
 \bibliography{$biblio-files$}
 $endif$
 $endif$
-$if(listings)$
 \usepackage{listings}
-$endif$
 $if(lhs)$
 \lstnewenvironment{code}{\lstset{language=Haskell,basicstyle=\small\ttfamily}}{}
 $endif$