Tutorial 1: Getting started using the editor

[VilleK]

I've written a short first tutorial which explains the main user interface of
the editor:

Tutorial 1: Getting started using the editor.

Hopefully you will find it useful! Please take a look and comment on any
errors or spelling mistakes.

Next, I will write a tutorial of making a small "Hello World" style project.

[abccad]

The tutorial is a good introduction.

Look forward to the "Hello world" Tutorial.

Thanks.