Update index.html

Added `nthreads = -1` (per Ray)

packaging/index.html

@@ -310,7 +310,7 @@ <h2>Use H<sub>2</sub>O directly from R</h2>
               <em># Next, we download, install and initialize the H<sub>2</sub>O package for R.</em><br/>
               install.packages("h2o", repos=(c("<script type="text/javascript">var url = location.href; var url2 = url.substring(0, url.lastIndexOf("/")); document.write(url2);</script>/R", getOption("repos"))))<br/>
               library(h2o)<br/>
-              localH2O = h2o.init()<br/><br/> 
+              localH2O = h2o.init(nthreads = -1)<br/><br/> 
               <em># Finally, let's run a demo to see H<sub>2</sub>O at work.</em><br/>
               demo(h2o.glm)
           </div>