Allow passthru of Teensy to Virtualbox for programming

Vagrantfile

@@ -30,7 +30,13 @@ Vagrant.configure(2) do |config|
   config.vm.provider "virtualbox" do |vb|
     # Hide the VirtualBox GUI when booting the machine
     vb.gui = false
-  
+    vb.customize ['modifyvm', :id, '--usb', 'on']
+    vb.customize ['usbfilter', 'add', '0',
+		  '--target', :id,
+		  '--name', 'teensy',
+		  '--vendorid', '0x16c0',
+		  '--productid','0x0478'
+    		 ] 
     # Customize the amount of memory on the VM:
     vb.memory = "512"
   end