reword gist button

index.html

@@ -66,7 +66,7 @@ THE SOFTWARE.
             <div class="info">
                 <p>
                     Version: <span id="version">(loading)</span><br/>
-                    Change to: <select id="versionSelector"></select> <button id="gist" title="Share files to a github gist">Share gist</button><br/>
+                    Change to: <select id="versionSelector"></select> <button id="gist" title="Publish all files as public gist on github.com">Publish all files as public gist</button><br/>
                     <code>tx.origin = <span id="txorigin"/></code>
                 </p>
             </div>