Bug#1121887: tutorial for incant

[Pirate Praveen]

I have documented the steps to get a working vm/container (I think it creates container by default - it'd be good to document how to change it a VM instead of container too) at https://wiki.debian.org/Packaging/Pre-Requisites/Virtual-Machine#Incant (my goal here is only as a step to teach/learn packaging in a sid environment but these kids of tutorial might be more generally useful too)

May be good to include it in /usr/share/docs or in the man page itself. If someone is trying it as a drop in replacement, there is still many steps once need to do. May be a vagrant-compat-incant or something if these cannot be automated in incant directly? Though I think doing these integrations directly in incant would be better as the original goal is to be a replacement for vagrant.

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