add erlang, more-complex shell examples

- some Erlang and escript files
 - .escript extension
 - .erlang extension
 - shell script with %, ##, name tokens

samples/Erlang/hello.escript

@@ -0,0 +1,4 @@
+#!/usr/bin/env escript
+-export([main/1]).
+
+main([]) -> io:format("Hello, World!~n").