Update README.md

Author: Benjamin Kerensa

README.md

@@ -3,7 +3,7 @@
 [![Codacy](https://img.shields.io/codacy/e27821fb6289410b8f58338c7e0bc686.svg)]()
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 # Glucosio for Android
-Glucosio for Android, an user centered free and open source app for Diabetes management and research for Android.
+Glucosio for Android, a user centered free and open source app for Diabetes management and research for Android.
 
 ![Glucosio Banner](https://cloud.githubusercontent.com/assets/5623301/14087778/f02be08c-f52b-11e5-9ff3-15bc5670cddb.png)