Adding example diagram as a template for a new diagram

packages/mermaid-example-diagram/src/parser/exampleDiagram.jison

@@ -0,0 +1,43 @@
+%lex
+
+%options case-insensitive
+
+%{
+	// Pre-lexer code can go here
+%}
+
+%%
+
+"info"		      return 'info'    ;
+[\s\n\r]+         return 'NL'      ;
+[\s]+ 		      return 'space';
+"showInfo"		  return 'showInfo';
+<<EOF>>           return 'EOF'     ;
+.                 return 'TXT' ;
+
+/lex
+
+%start start
+
+%% /* language grammar */
+
+start
+// %{	: info document 'EOF' { return yy; } }
+	: info document 'EOF' { return yy; }
+	;
+
+document
+	: /* empty */
+	| document line
+	;
+
+line
+	: statement { }
+	| 'NL'
+	;
+
+statement
+	:  showInfo   { yy.setInfo(true);  }
+	;
+
+%%