Added total number of warnings from all files.

Hello, 

I have made a pull request for issue #175 (https://github.com/troessner/reek/issues/175).

I have tested it using cucumber and all the tests pass with the new expected total warning count. One thing, I haven't been able to test it from the program. 

When I type "bin/reek <path>" in the command line it does not seem to call the modified code. I don't know if I missed something in my changes or I am doing something wrong to test the modified version ?