BINDINGS: added the Xojo binding

docs/BINDINGS

@@ -254,3 +254,8 @@ XBLite
 
   Written by David Szafranski
   http://perso.wanadoo.fr/xblite/libraries.html
+
+Xojo
+
+  Written by Andrew Lambert
+  https://github.com/charonn0/RB-libcURL