simplifyPath() "fits" better to Path class conceptually. It handles
paths, not lists them. Also this way we get rid of few unneeded
dependencies to FileLister class.
In this initial commit the Path class contains two methods for
converting path separators. I want to move cppcheck path handling
to direction that we internally have paths with / separator. And
convert from/to native separators when needed.
Kimmo Varis
Daniel Marjamäki