Handle single quoted strings.

lib/cue_scan.l

@@ -23,6 +23,8 @@ nonws		[^ \t\r\n]
 
 %%
 
+
+\'(\\.|[^\\'])*\'	|
 \"(\\.|[^\\"])*\"	{
 		cue_yylval.sval = strdup(yytext + 1);
 		cue_yylval.sval[strlen(cue_yylval.sval) - 1] = '\0';

lib/toc_scan.l

@@ -23,6 +23,7 @@ nonws		[^ \t\r\n]
 
 %%
 
+\'(\\.|[^\\'])*\'	|
 \"(\\.|[^\\"])*\"	{
 		toc_yylval.sval = strdup(yytext + 1);
 		toc_yylval.sval[strlen(toc_yylval.sval) - 1] = '\0';