docs tweak: add examples page, link to examples from home page

update to latest sw, ensure OPTIONS is not indexed as mentioned in webrecorder/pywb#569
ensure plugins-* directories are excluded from git and from jekyll
bump version to 1.0.1-alpha.0

src/replay.js

@@ -278,7 +278,7 @@ class Replay extends LitElement
     `}
 
     ${this.iframeUrl ? html`
-    <iframe @message="${this.onReplayMessage}" allow="autoplay 'self'; fullscreen"
+    <iframe @message="${this.onReplayMessage}" allow="autoplay 'self'; fullscreen" allowfullscreen
     src="${this.iframeUrl}"></iframe>
     ` : html`
       <nav class="panel intro-panel">