add source tree option as a difftoool and merge tool
delete unused os x settings
show and hide files os x aliases
delete tagbar bundle

there is a problem with vimux and tagbar
bug with autotag function from tagbar when generates tags for plugin vimux
with this method from vimux
  def _escape_command(command)
    command.gsub('"', '\"').gsub('$', '\$')
  end
workaround make autotag function from tagbar not to use flag -e whith vimrc files