added more info to README

README.md

@@ -2,7 +2,18 @@
 
 A Pebble Watchface for Pebble, Pebble Time and Pebble Time Round
 
-Original source code by lastfuture
-SDK 2.0beta4 port by Jnm
-SDK 3.0 port and colorizing by hexahedria
-adaptations for Chalk and Aplite by lastfuture
+## Demo videos
+
+[![Promo for Vine](https://img.youtube.com/vi/EjgYxUxGvdI/default.jpg)](https://youtu.be/EjgYxUxGvdI)
+
+[![Animation Showcase](https://img.youtube.com/vi/P3UX2pdzZdk/default.jpg)](https://youtu.be/P3UX2pdzZdk)
+
+## Other Platforms
+[Fitbit Versa](https://git.broken.graphics/alina/fitbit-squared)
+
+### Credits
+
+Original Squared 1.0 source code by Alina  
+SDK 2.0beta4 port by Jnm  
+SDK 3.0 port and colorization by hexahedria  
+Adaptations for all black and white and color Pebble models as well as continued development by Alina