[O] [Feature Request] Provide a way to jump to noweb reference definition under point

[address@hidden]

For example I have an Org buffer like this:

```org

#+NAME: define food-journal

#+BEGIN_SRC clojure

(def food-journal

  [{:month 1 :day 1 :human 5.3 :critter 2.3}

   {:month 1 :day 2 :human 5.1 :critter 2.0}

   {:month 2 :day 1 :human 4.9 :critter 2.1}

   {:month 2 :day 2 :human 5.0 :critter 2.5}

   {:month 3 :day 1 :human 4.2 :critter 3.3}

   {:month 3 :day 2 :human 4.0 :critter 3.8}

   {:month 4 :day 1 :human 3.7 :critter 3.9}

   {:month 4 :day 2 :human 3.7 :critter 3.6}])

#+END_SRC

#+BEGIN_SRC clojure

<<define food-journal>>

(take-while #(< (:month %) 3) food-journal)

#+END_SRC

```

The point is at `<<define food-journal>>`. Hope org-mode can provide and shortcut to jump to noweb reference definition `#+NAME: define food-journal`.

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