fixed some tutorial grammars and updated embedded section (JavaScript and web TODO)

examples/tutorial/embedded/QueryEng.gf

@@ -0,0 +1,15 @@
+concrete QueryEng of Query = {
+  lincat 
+    Answer, Question, Object = Str ;
+
+  lin 
+    Even x = "is" ++ x ++ "even" ;
+    Odd  x = "is" ++ x ++ "odd" ;
+    Prime x = "is" ++ x ++ "prime" ;
+    Number n = n.s ;
+
+    Yes = "yes" ;
+    No = "no" ;
+
+}
+