Vagrant: Switch to 32-bit VM.

This should be easier to install for most people, since it can be actually run on 32-bit machines (and on 64-bit machines with certain types of visualization turned off).

Vagrantfile

@@ -78,7 +78,7 @@ sphinxsearch_version  = "rel22" # rel20, rel21, rel22, beta, daily, stable
 Vagrant.configure("2") do |config|
 
   # Set server to Ubuntu 14.04
-  config.vm.box = "ubuntu/trusty64"
+  config.vm.box = "ubuntu/trusty32"
 
   config.vm.define "Vaprobash" do |vapro|
   end