deb/Vagrantfile improvements.

- Reduce memory size.
- Retrieve key.

deb/Vagrantfile

@@ -48,7 +48,7 @@ Vagrant.configure(2) do |config|
     # vb.gui = true
 
     # Customize the amount of memory on the VM:
-    vb.memory = "4096"
+    vb.memory = "2048"
   end
   #
   # View the documentation for the provider you are using for more
@@ -65,7 +65,8 @@ Vagrant.configure(2) do |config|
   # Puppet, Chef, Ansible, Salt, and Docker are also available. Please see the
   # documentation for more information about their specific syntax and use.
   config.vm.provision "shell", inline: <<-SHELL
-    wget -q -O- https://s3.amazonaws.com/download.fpcomplete.com/debian/fpco.key | sudo apt-key add -
+    wget -q https://s3.amazonaws.com/download.fpcomplete.com/debian/fpco.key
+    sudo apt-key add fpco.key
     echo 'deb http://download.fpcomplete.com/ubuntu/trusty stable main'|sudo tee /etc/apt/sources.list.d/fpco.list
     sudo apt-get update
     sudo apt-get install -y stack build-essential debhelper dh-make