Mention kvm-ok / the cpu-checker package in installation docs

[luxas]

ref: #118 (comment)

From @alexellis:

I wonder if you can install kvm-ok without installing a load of other packages for libvirt?

From @luxas:

I just checked that yes, you can get it via a apt-get install cpu-checker, without libvirt deps.

We should add a step to do apt-get install cpu-checker (or similar for rpms) to the installation.md doc

[alexellis]

sgtm

[alexellis]

Btw.. not sure if you've seen Derek yet, but he can help manage milestones, labels, issues, PRs etc (some features are optional too) - it's good for collaboration and for using the mobile interface which doesn't expose those buttons. There's a SaaS / app version too https://github.com/alexellis/derek/blob/master/GET.md https://github.com/alexellis/derek/blob/master/USER_GUIDE.md

[saiyam1814]

true, KVM is mandatory to check for ignite and can save a lot of time for new folks if they realize it before setting up ignite and try to run.

[luxas]

Put a fix up for this #145