def read_prj_settings(file)
      unless File.file?(file)
        file = File.dirname(__FILE__)+'/prj.rake'
      end
      KeyValueReader.new(file)
    end
def read_prj_settings(file)
      unless File.file?(file)
        file = File.dirname(__FILE__)+'/prj.rake'
      end
      KeyValueReader.new(file)
    end
Read project file if it exists

 @param [String] file      Filename of project file
 @return [KeyValueReader]  New KeyValueReader object with values provided via read project file