added a hydra link

README.md

@@ -1,3 +1,5 @@
-not-os is a small experimental OS i wrote for embeded situations, it is based heavily on NixOS, but compiles down to a kernel, initrd, and a 48mb squashfs
+not-os is a small experimental OS I wrote for embeded situations, it is based heavily on NixOS, but compiles down to a kernel, initrd, and a 48mb squashfs
 
 there are also example iPXE config files, that will check the cryptographic signature over all images, to ensure only authorized files can run on the given hardware
+
+and I have [Hydra](http://hydra.earthtools.ca/jobset/not-os/not-os-unstable#tabs-jobs) setup and doing automatic builds of not-os against nixos-unstable, including testing that it can boot under qemu