Added music section (v. 0.5.0)

compose-key-cheat-sheet.tex

@@ -144,7 +144,9 @@ Some characters may render differently depending on the font used.
 \section*{Music}
 
 \begin{description}
-	\item[•]
+	\item[\# b]Flat sign \hfill $\flat$
+	\item[\# f]Natural sign \hfill $\natural$
+	\item[\# \#]Sharp sign \hfill $\sharp$	
 \end{description}
 
 \section*{Accented Characters}