Hello,
Is it possible to allow qparse to preserve comments?
e.g. it currently does not:
```
justin@parens:/tmp$ cat a.rq
select * where {
?s ?p ?o
# comment here
}
justin@parens:/tmp$ ~/Downloads/apache-jena-4.7.0/bin/qparse --query a.rq
SELECT *
WHERE
{ ?s ?p ?o }
```
If comment lines (starting with #) are too tricky to work with what about
something like Clojure's `comment`
e.g.
```
(comment (range 5))
```
That way the "comment" is still part of the AST tree.
Maybe there could be a magic predicate that gets ignored?
```
[] ex:comment "comment here" .
```
