minor cmake fixes#54

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melnaquib wants to merge 5 commits intoFijee-Project:masterfrom

melnaquib:master

Commits on Dec 17, 2016

fix cmake files
Mustafa Elnaquib
committed
rename Doc folder to docs
Mustafa Elnaquib
committed

Commits on Jan 21, 2017

delete non-needed CGAL cmake module

mustafaa2
authored and
Mustafa Elnaquib
committed
compiles with packages available on ubuntu 18
Mustafa Elnaquib
committed

Commits on Dec 14, 2018

builds on debian stretch
Mustafa Elnaquib
committed