Add test fixtures

Test page loads fixtures and renders the inbox view. This may be useful
for smoke testing style changes or generating screenshots with
pseudo-realistic data.

Includes a couple small changes to get rendering working outside the
app.

test/fixtures_test.js

@@ -0,0 +1,17 @@
+'use strict';
+
+describe("Fixtures", function() {
+  before(function(done) {
+    Whisper.Fixtures.saveAll().then(done);
+  });
+  it('renders', function(done) {
+    ConversationController.updateInbox().then(function() {
+      var view = new Whisper.InboxView({appWindow: {contentWindow: window}});
+      view.$el.prependTo($('#render-android'));
+
+      var view = new Whisper.InboxView({appWindow: {contentWindow: window}});
+      view.$el.removeClass('android').addClass('ios');
+      view.$el.prependTo($('#render-ios'));
+    }).then(done,done);
+  });
+});