Added a license. It's very generous and respects your freedom.

Close #13.

LICENSE.md

@@ -0,0 +1,12 @@
+Hear ye! Hear ye!
+
+The code in this repository is licensed to you freely for any purpose,
+provided that you tip your bartender.
+
+Optionally, if you'd care to buy a beer for the developers, we mostly
+drink IPA but never refuse a good lambic.  Individual contributors
+might also enjoy single malt, arak/rakı, Unicum, or club soda.
+
+73 from Pizza Rat City,
+Travis Goodspeed, KK4VCZ
+