message: Doc: remove beta after verifying build from source docs
diff: @@ -119,7 +119,7 @@ cd
  wget http://nginx.org/download/nginx-${NGINX_VERSION}.tar.gz
  tar -xvzf nginx-${NGINX_VERSION}.tar.gz
  cd nginx-${NGINX_VERSION}/
  -./configure --add-module=$HOME/ngx_pagespeed-${NPS_VERSION}-beta ${PS_NGX_EXTRA_FLAGS}
  +./configure --add-module=$HOME/ngx_pagespeed-${NPS_VERSION} ${PS_NGX_EXTRA_FLAGS}
  make
  sudo make install
  </pre>
  @@ -150,7 +150,7 @@ you will have to configure ngx_pagespeed as follows, instead of the above
  </p>
  <pre class="prettyprint lang-sh">
  -setarch i686 ./configure --add-module=$HOME/ngx_pagespeed-release-${NPS_VERSION}-beta
  +setarch i686 ./configure --add-module=$HOME/ngx_pagespeed-release-${NPS_VERSION}
  </pre>
  <p>
  