Add ".es" to recognised ECMAScript extensions

* Add ".es" to recognised JavaScript extensions
* Add heuristic to differentiate Erlang from ECMAScript
* Add test-case for .es heuristic

samples/Erlang/170-os-daemons.es

@@ -0,0 +1,26 @@
+#! /usr/bin/env escript
+
+% Licensed under the Apache License, Version 2.0 (the "License"); you may not
+% use this file except in compliance with the License. You may obtain a copy of
+% the License at
+%
+%   http://www.apache.org/licenses/LICENSE-2.0
+%
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+% License for the specific language governing permissions and limitations under
+% the License.
+
+loop() ->
+	loop(io:read("")).
+
+loop({ok, _}) ->
+	loop(io:read(""));
+loop(eof) ->
+	stop;
+loop({error, Reason}) ->
+	throw({error, Reason}).
+
+main([]) ->
+	loop().