Add Debian to Ubuntu

debian-ubuntu.md

@@ -0,0 +1,11 @@
+[Ubuntu][10] began as a fork of [Debian][20] in October 2004, between the
+releases of [Debian 3.0 (woody)][30] and [Debian 3.1 (sarge)][40]
+
+It has not been a hard fork, however, as Ubuntu continues to draw from
+Debian and the two projects have some level of cooperation between them.
+
+[10]: https://en.wikipedia.org/wiki/Ubuntu 
+[20]: https://en.wikipedia.org/wiki/Debian
+[30]: https://en.wikipedia.org/wiki/Debian_version_history#Debian_3.0_(Woody)
+[40]: https://en.wikipedia.org/wiki/Debian_version_history#Debian_3.1_(Sarge)
+