Merge pull request kahun#419 from boardstretcher/patch-4

Add LXD

README.md

@@ -556,6 +556,7 @@ Please read [CONTRIBUTING](./CONTRIBUTING.md) if you wish to add software.
 * [Bitnami](https://bitnami.com/) - Produces open source installers or software packages for web applications and development stacks as well as virtual appliances.
 * [Docker](http:https://www.docker.com/) - Open platform for developers and sysadmins to build, ship, and run distributed applications.
 * [LXC](https://linuxcontainers.org/lxc/) - Userspace interface for the Linux kernel containment features.
+* [LXD](https://linuxcontainers.org/lxd/) - LXD is a container "hypervisor".
 * [OpenVZ](http:https://openvz.org) - Container-based virtualization for Linux.
 * [Docker Compose](https://docs.docker.com/compose/) - Fast, isolated development environments using Docker.
 * [Singularity](http:https://singularity.lbl.gov/) - Flexible containers without root.