Specify 64-bit OS requirement. Closes #103.

README.textile

@@ -55,7 +55,7 @@ h1. Usage
 h2. What You'll Need
 
 # A VPS (or bare-metal server if you wanna ball hard). My VPS is hosted at "Linode":http://www.linode.com/?r=45405878277aa04ee1f1d21394285da6b43f963b. You'll probably want at least 512 MB of RAM between Apache, Solr, and MySQL. Mine has 1024.
-# "Debian 7":http://www.debian.org/News/2013/20130504 or an equivalent Linux distribution. (You can use whatever distro you want, but deviating from Debian will require more tweaks to the playbooks. See Ansible's different "packaging":http://www.ansibleworks.com/docs/modules.html#packaging modules.)
+# "64-bit Debian 7":http://www.debian.org/ or an equivalent Linux distribution. (You can use whatever distro you want, but deviating from Debian will require more tweaks to the playbooks. See Ansible's different "packaging":http://www.ansibleworks.com/docs/modules.html#packaging modules.)
 # A wildcard SSL certificate. You can either buy one or self-sign if you want to save money.
 # A "Tarsnap":http://www.tarsnap.com account with some credit in it. You could comment this out if you want to use a different backup service. Consider paying your hosting provider for backups or using an additional backup service for redundancy.