v1.1.0-beta.4

Reduce download size by ~125MB versus the previous beta build, about
~25MB over the previous production build (#1869)

Dev:
  - Update to v1.0.41 equivalence
  (5bc70c35e7)
  - This update to match production includes update fixes for OSX.
  Note: The transition v1.1.0-beta.3->v1.1.0-beta.4 will still have
  upgrade difficulties. When v1.1.0-beta.4 updates to the next release
  version, the behavior will be fixed.

package.json

@@ -3,7 +3,7 @@
   "productName": "Signal",
   "description": "Private messaging from your desktop",
   "repository": "https://github.com/WhisperSystems/Signal-Desktop.git",
-  "version": "1.1.0-beta.3",
+  "version": "1.1.0-beta.4",
   "license": "GPL-3.0",
   "author": {
     "name": "Open Whisper Systems",