delete loan is ready. with basic info validation

apiV1LoanSingle.go

 		l.Amount = input.Amount
 		l.Item = input.Item
 		l.Rating = input.Rating
+		l.Settlement = input.Settlement
 		l.Description = input.Description
 		e = l.WriteBasic()
 		if e != nil {
+			log.Error("cannot save basic loan", e.Error())
 			apiV1Client404Error(w, r, ss)
 		} else {
 			apiV1SendJson(l, w, r, ss)
 	}
 
 }
+
+func apiV1LoanSingleDelete(w http.ResponseWriter, r *http.Request, ss *loan.Session) {
+	loanId := r.URL.Path[len(apiV1Prefix+"loan/"):] //remove prefix
+
+	e := loan.Delete(loanId)
+	if e != nil {
+		log.Error("cannot delete loan by id ", loanId, e.Error())
+		apiV1Client404Error(w, r, ss)
+		return
+	}
+
+	apiV1SendJson(loanId, w, r, ss)
+
+}

apiv1.go

 			{"GET", "chart/top-broker", apiV1ChartTopBroker},
 			{"POST", "grid/loan/full-loan-overview", apiV1GridLoanFullOverview},
 			{"GET", "loan/", apiV1LoanSingleGet},
+			{"DELETE", "loan/", apiV1LoanSingleDelete},
 			{"GET", "people/", apiV1PeopleGet},
 			{"GET", "broker/", apiV1BrokerGet},
 			{"POST", "loan/basic/", apiV1LoanSinglePostBasic},
 			{"GET", "chart/top-broker", apiV1ChartTopBroker},
 			{"POST", "grid/loan/full-loan-overview", apiV1GridLoanFullOverview},
 			{"GET", "loan/", apiV1LoanSingleGet},
+			{"DELETE", "loan/", apiV1LoanSingleDelete},
 			{"GET", "people/", apiV1PeopleGet},
 			{"GET", "broker/", apiV1BrokerGet},
 			{"POST", "loan/basic/", apiV1LoanSinglePostBasic},