Merge branch 'master' of github.com:grafana/grafana into externalPlugin

Conflicts:
	pkg/api/api.go
	pkg/api/api_plugin.go
	pkg/api/datasources.go
	pkg/api/frontendsettings.go
	pkg/api/index.go
	pkg/plugins/models.go
	pkg/plugins/plugins.go

pkg/api/datasources.go

@@ -66,6 +66,7 @@ func GetDataSourceById(c *middleware.Context) Response {
 		BasicAuth:         ds.BasicAuth,
 		BasicAuthUser:     ds.BasicAuthUser,
 		BasicAuthPassword: ds.BasicAuthPassword,
+		WithCredentials:   ds.WithCredentials,
 		IsDefault:         ds.IsDefault,
 		JsonData:          ds.JsonData,
 	})