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.

assets/webapps/in_app_pay_test.gaiamobile.org/index.html

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+<html>
+  <head>
+    <title>In-App Payments Tester</title>
+    <meta charset="utf-8"/>
+    <link rel="stylesheet" type="text/css" href="style.css"/>
+  </head>
+  <body>
+    <iframe id="app" src="http://inapp-pay-test.paas.allizom.org"></iframe>
+  </body>
+</html>

assets/webapps/in_app_pay_test.gaiamobile.org/manifest.webapp

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+{"name":"In-app Payment Tester","description":"Utility app to test in-app payments.","version":"2.5","launch_path":"/index.html","developer":{"name":"The Gaia Team","url":"https://github.com/mozilla-b2g/gaia"},"default_locale":"en","icons":{"84":"/style/icons/default_84.png","126":"/style/icons/default_126.png","142":"/style/icons/default_142.png","189":"/style/icons/default_189.png","284":"/style/icons/default_284.png"},"origin":"app://in_app_pay_test.gaiamobile.org"}

assets/webapps/in_app_pay_test.gaiamobile.org/style.css

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+#app {
+  position: fixed;
+  border: 0;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  width: 100%;
+  height: 100%;
+}