Added readme to the top of the .tig file.

tigersay.tig

@@ -1,3 +1,18 @@
+/* ##  Tigersay  ##
+
+   Implementation of cowsay in the Tiger programming language.
+   Does not come as a binary, nor with a Tiger compiler.
+   Compilation is left as an exercise for the reader.
+
+   ## License ##
+
+   <jonjmaa@gmail.com> wrote this program. As long as you retain this notice you
+   can do whatever you want with this stuff. If we meet some day, and you think
+   this stuff is worth it, you can buy me a beer in return.
+
+   - Jon Michael Aanes
+
+*/
 
 let
     /*************/