Enable outline view

Summary:
Requires building cquery on branch pelmers/containername-change to look correct.

The LSP specification specifically warns against using documentSymbols containerName fields to create symbol hierarchies but that's exactly what we do in the outline view. In the future I think there would be better ways to do this.
https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#textDocument_documentSymbol
and discussion at microsoft/language-server-protocol#136

Reviewed By: a20012251

Differential Revision: D6451986

fbshipit-source-id: 9182535584910f82039662951a1d2b9e461b47d8

pkg/nuclide-cquery-lsp/lib/main.js

@@ -353,6 +353,12 @@ class Activation {
         analyticsEventName: 'cquery.getActions',
         applyAnalyticsEventName: 'cquery.applyAction',
       },
+      outline: {
+        version: '0.1.0',
+        analyticsEventName: 'cquery.outline',
+        updateOnEdit: true,
+        priority: 1,
+      },
     };
 
     const languageService = new AtomLanguageService(