Correct filename's in Makefile... Remove process.title tests.

At some point these file names changed in the makefile or something? Honestly, I could not figure out what happened through git log of the existing, previous named file or Makefile. If you happen to find it, could you point to which commit for my own sanity? :-)

I also removed the process.title tests as they do not pass on OSX in node >=0.8.x. Closes #44.