demo link added to readme

Author: kekayan

README.md

@@ -1,7 +1,10 @@
 # FabFit
 notkekayan@gmail.com Kekayan kekayan IA9
 ***
-
+Download the [apk](https://github.com/codezilla2018/FabFit/raw/master/demo/app.apk) or (abb)[https://github.com/codezilla2018/FabFit/raw/master/demo/app.apk]
+or
+[both](https://github.com/codezilla2018/FabFit/tree/master/demo)
+***
 <p float="left">
   <img src="https://github.com/kekayan/FabFit/raw/master/screenshots/steps.png" width="250" />
   <img src="https://github.com/kekayan/FabFit/raw/master/screenshots/tweets.png" width="250" />