[video tutorial] hello world using dmd, rdmd, dub and vibe.d

[simendsjo]

http://youtu.be/8TV9ZZteYEU

The content wasn't planned, and English is not my native tongue.
Hopefully it can still be useful for newbies.

This is pretty much a response to a recent discussion on the lack 
of documentation/tutorials: 
http://forum.dlang.org/post/spdddifmaacihlcumvdp@forum.dlang.org

PS: The many delays are X going black, forcing me to switch to a 
different terminal and back again.