move webtorrent back into main window

We keep webtorrent running when the window is “closed” by hiding the
window instead.

main/views/app.js

@@ -0,0 +1,56 @@
+module.exports = App
+
+var h = require('virtual-dom/h')
+
+function App (state, handler) {
+  if (state.player) {
+    return h('.player', [
+      h('video', {
+        src: state.player.url,
+        autoplay: true,
+        controls: true
+      }),
+      h('button.close', {
+        onclick: closePlayer
+      }, 'Close')
+    ])
+  } else {
+    var list = state.torrents.map(function (torrent) {
+      var style = {}
+      if (torrent.posterURL) {
+        style['background-image'] = 'url("' + torrent.posterURL + '")'
+      }
+      return h('.torrent', {
+        style: style
+      }, [
+        h('.name', torrent.name),
+        h('.progress', String(torrent.progress * 100) + '%'),
+        h('button.play', {
+          disabled: !torrent.ready,
+          onclick: openPlayer
+        }, 'Play')
+      ])
+
+      function openPlayer () {
+        handler('openPlayer', torrent)
+      }
+    })
+    return h('.app', [
+      h('.torrent-list', list),
+      h('.add', [
+        h('button', {
+          onclick: onAddTorrent
+        }, 'Add New Torrent')
+      ])
+    ])
+  }
+
+  function onAddTorrent (e) {
+    var torrentId = 'magnet:?xt=urn:btih:6a9759bffd5c0af65319979fb7832189f4f3c35d&dn=sintel.mp4'
+    handler('addTorrent', torrentId)
+  }
+
+  function closePlayer () {
+    handler('closePlayer')
+  }
+}