Add installation example with checkinstall and cmake

[kfirgollan]

Just a little help for newcomers to use the library without hassle.

[ToruNiina]

Thank you for the suggestion.
Basically it looks good to me.

But, since I have not used checkinstall for installing this repository (actually, I have never installed my repository. I always use it through git submodule), I don't know whether it works. Do you use checkinstall? And does it work?

[kfirgollan]

Regarding your question on checkinstall it works great.
I tend to use deb as a simple way to install packages on multiple locations (e.g on a development workstation + production containers etc). Much easier to manage the debs vs the git submodules, since usually I don't update that often.
Adding git lfs to the picture and storing them makes it also easy to distribute.