Proper CMake support

[Quincunx271]

It would be nice to be able to consume this library from cmake with syntax like:

find_package(FakeIt REQUIRED)

# ...

target_link_libraries(MyTarget FakeIt::FakeIt)

Some options I know of to make this possible:

• Write a FindFakeIt.cmake file.
• Flesh out CMakeLists.txt to be able to build and install FakeIt

[libenike]

I have implemented cmake support of FakeIt.
In my fork you can link FakeIt to a project by this way:

find_package(FakeIt REQUIRED)

# ...

target_link_libraries(MyTarget FakeIt::FakeIt)

Link to the pull request.
Link to a simple project which use FakeIt. Here you can find detailed building instructions for the project.

[FranckRJ]

Fixed by #192 and #311, it's already in master.