Fix CI

[cbachhuber]

Addressing #31:

• Link dogm privately against glew and related libraries
• Re-create deleted build folder (only during compilation in CI), as suggested by @TheCodez
• Tidy up CI instructions (this is according to my taste, feel free to suggest changes)

[TheCodez]

This introduced some small CMake errors on windows. Will report back once I fixed them.

[TheCodez]

Could you please change line 20 in CMakelists.txt to

if (NOT WIN32)
	find_package(GLEW)
endif()

I will try to automate the dependency searching on Windows in the future.

[TheCodez]

Now it can't find <glm/vec4.hpp> when compiling, nice 😀

[cbachhuber]

I implemented both your suggestions. Does that fix the Windows build?

CI is still green 👍

[TheCodez]

Nice 👍

[TheCodez]

Yes, thank you!