added LICENCE file (no change in licence itself)

LICENCE.md

@@ -0,0 +1,4 @@
+"THE BEER-WARE LICENSE" (Revision 42):
+<romain@albirew.fr> 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.     Romain Laureaux

README.md

@@ -1,6 +1,6 @@
 coto_rss
 ===
-![LICENSE](https://img.shields.io/badge/license-beerware-blue.svg)
+[![LICENSE](https://img.shields.io/badge/license-beerware-blue.svg)](LICENSE.md)
 
 coto_rss is a PHP project capable of correcting faulty RSS feeds rampaging around the internet (can also be used as an RSS feeds proxy)