finalise readme

README.md

@@ -43,3 +43,27 @@ all of the endpoints are in /service
 
 for more information about the endpoints, you can check the wsdl file in /service?wsdl
 
+## Contributors
+1. initial setup
+    - 13521022
+2. authentication
+    - 13521021
+    - 13521022
+3. gems management
+   - 13521022 
+4. transaction management
+   - 13521022 
+5. voucher logging
+     - 13521022
+6. request logging
+     - 13521022
+ 7. integration
+    - 13521019
+    - 13521021
+8. mail support
+    - 13521022 
+9. testing and fixing bugs
+   - 13521019
+   - 13521021
+   - 13521022 
+