Better/faster exporting

* add --build and --build-dir options to sapper export (#325)

* tweak export logging, update port-authority to prevent timeout bug

* better logging of export progress

* handle case where linked resource is already fetched

* default to .sapper/dev instead of .sapper

* handle query params and redirects

* dont write server_info.json either - second half of #318

* update changelog

* update lockfile

* try to track down ci test failures

* err wut

* curiouser and curiouser

* ok, seems to work now

src/api/dev.ts

@@ -9,6 +9,7 @@ import format_messages from 'webpack-format-messages';
 import { locations } from '../config';
 import { EventEmitter } from 'events';
 import { create_routes, create_main_manifests, create_compilers, create_serviceworker_manifest } from '../core';
+import Deferred from './utils/Deferred';
 import * as events from './interfaces';
 
 export function dev(opts) {
@@ -168,8 +169,6 @@ class Watcher extends EventEmitter {
 			},
 
 			result: info => {
-				fs.writeFileSync(path.join(dest, 'server_info.json'), JSON.stringify(info, null, '  '));
-
 				this.deferreds.client.promise.then(() => {
 					const restart = () => {
 						log = '';
@@ -400,19 +399,6 @@ function mungeWebpackError(message: string, duplicate: boolean) {
 	};
 }
 
-class Deferred {
-	promise: Promise<any>;
-	fulfil: (value?: any) => void;
-	reject: (error: Error) => void;
-
-	constructor() {
-		this.promise = new Promise((fulfil, reject) => {
-			this.fulfil = fulfil;
-			this.reject = reject;
-		});
-	}
-}
-
 const INTERVAL = 10000;
 
 class DevServer {