Updated install info

Author: subhra74

README.md

@@ -10,3 +10,7 @@ Installation
 - Run ./start-ews.sh (For security reasons do not use root user)
 - Open recent version on Chrome or Firefox and visit https://[your ip address]:8055/ or, on local machine use https://localhost:8055/
 - Ignore any certificate error, appeared due to newly created self signed certificate by easy web shell.
+- Initial credential: 
+				Username: admin
+				Password: admin
+  Please change default username and password from Settings tab in the app