Publish Vulpes Preview 15 sources for desktop, Android and Tundra

Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.

gaia/dev_apps/test-receiver-2/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1">
+    <meta charset="utf-8">
+    <title>Test Receiver</title>
+  </head>
+  <body>
+    <h1>Test multi activities receiver#2</h1>
+    <p><i>This test app is here for so that the uitest app will have
+    more than one activity target to invoke.</i></p>
+  </body>
+</html>

gaia/dev_apps/test-receiver-2/manifest.webapp

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+{
+  "name": "Test Receiver#2",
+  "description": "Dummy app to respond to Test web activities",
+  "launch_path": "/index.html",
+  "developer": {
+    "name": "The Gaia Team",
+    "url": "https://github.com/mozilla-b2g/gaia"
+  },
+  "activities": {
+    "test": {
+      "filters": {
+        "type": "text"
+       },
+      "disposition": "window"
+    }
+  },
+  "icons": {
+    "84": "/style/icons/test-receiver_84.png",
+    "126": "/style/icons/test-receiver_126.png",
+    "142": "/style/icons/test-receiver_142.png",
+    "189": "/style/icons/test-receiver_189.png",
+    "284": "/style/icons/test-receiver_284.png"
+  }
+}