Bugfix: Change Cwd::abs_path for File::Spec->rel2abs

Cwd::abs_path tries to resolve symlinks, File::Spec->rel2abs does not.
* I don't want to follow symlinks (right now).
* When trying to resolse a symlink, if the symlink was broken the code
  would break.
If given dir has an absolute path then print result as absolute path
Print Permission denied warning in a similar way as find
Bump version to 0.3