add vim-signature plugin (mark-handling)

vim/settings/colorscheme.vim

@@ -13,3 +13,6 @@
 "set t_Co=16
 set background=dark         " Assume a dark background
 colorscheme solarized
+
+" Remove strange grey highlight in solarized terminal.
+highlight SignColumn ctermbg=8

vim/vimrc.bundles

@@ -33,6 +33,7 @@ Bundle 'kien/ctrlp.vim'
 Bundle 'tacahiroy/ctrlp-funky'
 Bundle 'joonty/vdebug'
 Bundle 'tpope/vim-repeat'
+Bundle 'kshenoy/vim-signature'
 
 Bundle 'nathanaelkane/vim-indent-guides'
 Bundle 'altercation/vim-colors-solarized'