Update documentation to include information about from_name values

docs/sources/http_api/admin.md

@@ -158,6 +158,7 @@ with Grafana admin permission.
         "cert_file":"",
         "enabled":"false",
         "from_address":"admin@grafana.localhost",
+        "from_name":"Grafana Admin",
         "host":"localhost:25",
         "key_file":"",
         "password":"************",

docs/sources/installation/configuration.md

@@ -542,6 +542,9 @@ Verify SSL for smtp server? defaults to `false`
 ### from_address
 Address used when sending out emails, defaults to `admin@grafana.localhost`
 
+### from_name
+Name to be used when sending out emails, defaults to `Grafana Admin`
+
 ## [log]
 
 ### mode