add license and force user to buy me a beer

ProFatXuanAll · ProFatXuanAll · commit 639b1940ddbb · 2020-09-24T15:42:37.000+08:00
diff --git a/LICENSE b/LICENSE
@@ -0,0 +1,4 @@
+"THE BEER-WARE LICENSE" (Revision 42):
+<phk@FreeBSD.ORG> wrote this file.  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.   Poul-Henning Kamp
