fixed some scope issues and added label and line reference support to the AST

test2.grnd

@@ -5,8 +5,8 @@ fun -list !split -string &str -string &determiner
 set &x 2
 set &y 5
 add $x $y &x
-stdlnout $x
+return $x
 endfun
 
-# should error
-stdlnout $x
+@myLabel
+jump %myLabel