Add Vagrantfile + scripts

I'm trying out [Vagrant](https://www.vagrantup.com) for reducing the pain of development environments for the application.
Exact instructions can be found [in the readme](https://github.com/mbernson/logboek/tree/a5ebaa412b2e7bcd0772fc337a022e39df3f401e#vagrant), but it comes down to:

* Install vagrant
* Run **vagrant up**
* Grab coffee
* The app should now be running at [192.168.10.10](192.168.10.10)

@l0ngestever, @y0sh1, @Chestervdb, could you give this a try on your machines before it goes to master?