Add Vagrantfile

This should help with testing development code and new releases. To use,
just install vagrant and run vagrant up && vagrant ssh

.gitignore

@@ -52,3 +52,4 @@ man/Makefile
 src/Makefile
 src/backupninja
 src/ninjahelper
+vagrant

Vagrantfile

+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+ENV["LC_ALL"] = "en_US.UTF-8"
+
+Vagrant.configure("2") do |config|
+  config.vm.box = "debian/stretch64"
+  config.vm.provision "shell", inline: <<-SHELL
+    locale-gen
+    apt-get update
+    apt-get install -y git automake make
+    git clone https://0xacab.org/riseuplabs/backupninja.git
+    chown vagrant: backupninja -R
+  SHELL
+end