my second commit, where i tried to implement googleTest

I tried to implement googletest, i dont get any failures while compiling,
but he keeps returning 1 while im running the program. I dont know why.
Not sure if these Tests are working or not.
commit because im getting error messages while i want to push to github, hopes this fixes it
Merge branch 'master' of https://github.com/Schweiker/AlgorithmEngineering
added files to make the makefile work