Use Conan for CGAL on Windows

Two repositories:

• https://github.com/CGAL/conan-gmp
• https://github.com/CGAL/conan-mpfr

A Conan remote on bintray:

cgal: https://api.bintray.com/conan/cgal/public-conan

Precompiled binaries

Use this conanfiles.txt to prepare precompiled binaries for Windows:

[requires]
mpfr/[>3]@cgal/testing

[imports]
lib, *.lib    -> ./lib
lib, *.so*    -> ./lib
bin, *.dll    -> ./bin
include, *.h  -> ./include
., license*   -> ./licenses @ folder=True, ignore_case=True
., copying*   -> ./licenses @ folder=True, ignore_case=True
., readme*    -> ./licenses @ folder=True, ignore_case=True

CGAL Dependencies