Add cmake support.

[libenike]

Replace old CMakeLists.txt with the new one.
Now FakeIt can be linked to the project in the following way:

find_package(FakeIt)
...
target_link_libraries(a_project
    PRIVATE
        FakeIt::FakeIt
)

I found a related issue with this request.
Also, I create a repository with a simple project which uses FakeIt and a detailed description of building the project.

[coveralls]

Coverage remained the same at 99.923% when pulling 08d41c6 on libenike:feature/add_cmake_support into 317419c on eranpeer:master.

[aboseley]

Whats the status of this pull request?

[libenike]

Whats the status of this pull request?

The status is open. I am waiting for any response from contributors. You are welcome to leave any suggestions about my fork.

[aboseley]

@libenike , your branch works for me, I'd like to see this merged to master.

[FranckRJ]

I've thought about it, wouldn't it be better to have one target per configuration? With explicit names I guess, so no "FakeIt::FakeIt" but instead "FakeIt::standalone" or something like that.

[FranckRJ]

I've updated some things in this PR: #311

I removed the target FakeIt::FakeIt, it was replaced by FakeIt::FakeIt-standalone and there's one target per configurations. I guess it's better to install everything even if it makes names a bit more complicated, but maybe we can add a "default configuration" option which will create a target FakeIt::FakeIt to keep the name clean. I don't know yet, it can always be added latter anyway.