Updated training video for dev setup

MovingBlocks

Once in a while somebody will prepare a video showing them setting up to run Terasology from source then proceed to develop something minor to demonstrate. But these videos go out of date as the project changes.

The goal of this task is to make a new one showcasing the very latest code and utility, such as using the groovyw script to fetch and update modules.

Alternatively this could also be done for Destination Sol or some of our tool projects (the Box2D Editor, Kallisti + JNLua, etc)

Definition of 'Done'

A video is submitted online in a public video sharing site - likely Youtube, but Vimeo would also work
The video should show the process from start to finish (cloning the code to the game running from source)
Include a few new elements like how to use the groovyw script and some new modules of interest like the ModuleTestingEnvironment or TestReplayModule

Where to start

See some older example videos like https://www.youtube.com/watch?v=m2t5Xl0Zxos or https://www.youtube.com/watch?v=cCMQ5VaKnfw or even this blog guide by Nihal
Review the Terasology dev docs, such as https://metaterasology.github.io/docs/developerIntro/fullWorkspace.html
Consider searching Google for tips and tricks to make nice and engaging instructional videos. For instance you can use text-based annotation instead of voice instructions (those can be edited over time and translate easier)