Display actual synapse errors (#17)

* Display actual synapse errors

* Show actual errors from dataProvider requests

* update README

src/components/error.ts

@@ -0,0 +1,6 @@
+export type MatrixError = {
+	errcode: string;
+	error: string;
+}
+
+export const displayError = (errcode: string, status: number, message: string) => `${errcode} (${status}): ${message}`;