Vagrantfile: Add a stub here

Closes: #269
Approved by: jlebon

Vagrantfile

@@ -0,0 +1,13 @@
+# vi: set ft=ruby :
+
+# In the future, this might do something more interesting
+# like contain code to sync git from the local dir into
+# the system and do builds/installs there.  But for
+# now at least this exists as a starting point, and
+# once `ostree admin unlock` exists in the next version,
+# things will be a bit simpler.
+
+Vagrant.configure(2) do |config|
+    config.vm.box = "fedora/23-atomic-host"
+    config.vm.hostname = "fedoraah-dev"
+end