Improve torrent.createServer() index page

- Download link uses correct filename
- List shows file paths, not just name
- Add file size
- Show torrent name at top, instead of generic “WebTorrent” title

lib/server.js

@@ -3,6 +3,7 @@ module.exports = Server
 var debug = require('debug')('webtorrent:server')
 var http = require('http')
 var mime = require('mime')
+var prettyBytes = require('pretty-bytes')
 var pump = require('pump')
 var rangeParser = require('range-parser')
 var url = require('url')
@@ -58,9 +59,12 @@ function Server (torrent, opts) {
       if (pathname === '/') {
         res.setHeader('Content-Type', 'text/html')
         var listHtml = torrent.files.map(function (file, i) {
-          return '<li><a href="/' + i + '">' + file.name + '</a></li>'
+          return '<li><a download="' + file.name + '" href="/' + i + '">' + file.path + '</a> ' +
+            '(' + prettyBytes(file.length) + ')</li>'
         }).join('<br>')
-        return res.end('<h1>WebTorrent</h1><ol>' + listHtml + '</ol>')
+
+        var html = '<h1>' + torrent.name + '</h1><ol>' + listHtml + '</ol>'
+        return res.end(html)
       }
 
       var index = Number(pathname.slice(1))