Update in-browser preview and Indus Appstore links

Author: simonrob

README.md

@@ -1,6 +1,6 @@
 MediaPhone
 ==========
-MediaPhone is an Android storytelling and multimedia narrative application. You can find it on Google Play as [Com-Phone Story Maker](https://play.google.com/store/apps/details?id=ac.robinson.mediaphone). It is also available on [F-Droid](https://f-droid.org/packages/ac.robinson.mediaphone/), [Amazon](https://www.amazon.co.uk/dp/B00C2RMU0M/) and [App Bazaar](appbazaar://details?id=ac.robinson.mediaphone), or you can try a [preview in your browser](https://appetize.io/app/ytq8mk02pp86770jzdzzx7d1jw).
+MediaPhone is an Android storytelling and multimedia narrative application. You can find it on Google Play as [Com-Phone Story Maker](https://play.google.com/store/apps/details?id=ac.robinson.mediaphone). It is also available on [F-Droid](https://f-droid.org/packages/ac.robinson.mediaphone/), [Amazon](https://www.amazon.co.uk/dp/B00C2RMU0M/) and [Indus Appstore](https://www.indusappstore.com/apps/tools/com-phone/ac.robinson.mediaphone/), or you can try a [preview in your browser](https://appetize.io/app/b_vrhl5xuqnomkv7iykemw7ipr2y).
 
 What does it do?
 ----------------