Use peerdependencies for all

package.json

@@ -42,6 +42,14 @@
     "webpack": "^1.12.11"
   },
   "peerDependencies": {
+    "phosphor-arrays": "^1.0.6",
+    "phosphor-codemirror": "0.0.1",
+    "phosphor-domutil": "^1.2.0",
+    "phosphor-dragdrop": "^0.9.0",
+    "phosphor-menus": "^1.0.0-rc.1",
+    "phosphor-messaging": "^1.0.6",
+    "phosphor-panel": "^1.0.0-rc.1",
+    "phosphor-properties": "^2.0.0",
     "phosphor-widget": "^1.0.0-rc.1"
   },
   "scripts": {