changed app to open in windowed mode, but stream in fullscreen

- this closes #45
- changed references of 'target' into 'host' as per #41

static/js/background.js

@@ -1,6 +1,6 @@
 // just start the app in fullscreen
 chrome.app.runtime.onLaunched.addListener(function() {
     chrome.app.window.create('index.html', {
-        state: "fullscreen",
+        state: "normal",
     });
 });