remove setting allowFullPageRender

It seems to me that this is not required anymore. I couldn’t find this property in React’s or ReactMount’s current source code and it doesn’t break anything. There also seems to be no documentation about this property or I couldn’t find it. Please let me know if I'm mistaken.
Merge pull request #17 from maxhoffmann/patch-1

remove setting allowFullPageRender
use strict;
Warning about URLs.
Merge pull request #21 from chrisdew/patch-2

Warning about URLs.
Merge branch 'master' of github.com:andreypopp/react-quickstart into andreypopp-master

Conflicts:
	client.js