Tests folder error

[StefanoCecere]

hi, i had to delete the "Tests" directory because of compilation errors (also if i added the package NUnit)
it would be nice if it was in a test branch or something alike.. so that we can add this framework as a git submodule without major issues

[luis-l]

Could you share the the compilation errors you got? I am curious to see what the cause was.

I will add a way to make the test assembly optional