Added CMake support.

[thomasfsteeples]

Added CMake support. Created new src and include directories to help facilitate this. Updated meson.build and Makefile to reflect new directory structure. Updated README.md to explain how to integrate µnit into a project using CMake.

[nemequ]

I'm okay with adding CMake support, but I don't want to rename the files since it would break existing code… If you're willing to rework this a bit so munit.{c,h} aren't renamed I'd be happy to merge it.

[hungrybluedev]

I'm currently using µnit in my project which is built with CMake, and I'll be delighted if this PR gets merged.

I agree with @nemequ with the fact that it would be better to keep the source files in the root to retain support for existing codebases. It might not be the most aesthetic thing to keep the sources outside src but we can make an exception here because there aren't a lot of source files in this project.

[thomasfsteeples]

@nemequ, that sounds reasonable. I've put the source/include files back in their original locations. Let me know if you would like anything else changed.

[codylico]

I notice that the CMake file hard-codes munit to build in Release mode. Is that the intent?
See line 28 of CMakeLists.txt.

[thomasfsteeples]

I notice that the CMake file hard-codes munit to build in Release mode. Is that the intent?
See line 28 of CMakeLists.txt.

So this was intentional, but happy to change this if the consensus is that this isn't sane.

[codylico]

I am okay with hard-coded Release mode in this case. Anyone else have thoughts?

[ghost]

@thomasfsteeples I have written a CMake module along with a helper cmake file with function munit_dicover_tests that could be used to automatically discovering test case from any CMake test target that uses Munit for unit testing, just like gtest_dicover_tests in GoogleTest CMake module in this gist. For more info, see issue #76.

The files in this gist could be useful for inclusion in this PR to simplify the usage of CMake with Munit.

[evo-i]

It was too bad to change the c standard and use some kind of flags for global, can break existing code which include this project with itself. Check pr with #100