beremiz

Add function example to first_steps example

2018-05-31, Surkov Sergey
ce5bd74ed552
Add function example to first_steps example

It'll be used in documentation to show how to create function in
Beremiz.
<?xml version='1.0' encoding='utf-8'?>
<BeremizRoot URI_location="LOCAL://">
<TargetType/>
</BeremizRoot>