Add colortest - from http://www.vim.org/scripts/script.php?script_id=1349

Run: colortest -w
Add 256colors2.pl - from xorg
256color2.pl - Show color numbers
256Color2.pl - be good
256color2.pl - Do not use more whitespace than necessary for color cube
functions - Add GetHighlightAttrs()
add vim-gitgutter.vim customization