update vimrc colors with signify

.vimrc

@@ -118,7 +118,8 @@ Plug 'bps/vim-textobj-python'
 Plug 'scrooloose/nerdcommenter'
 Plug 'sjbach/lusty'
 Plug 'w0rp/ale'
-Plug 'airblade/vim-gitgutter'
+"Plug 'airblade/vim-gitgutter'
+Plug 'mhinz/vim-signify'
 Plug 'vim-airline/vim-airline'
 Plug 'vim-airline/vim-airline-themes'
 Plug 'junegunn/fzf'
@@ -197,6 +198,17 @@ nmap <silent> gy <Plug>(coc-type-definition)
 nmap <silent> gi <Plug>(coc-implementation)
 nmap <silent> gr <Plug>(coc-references)
 
+" Use K to show documentation in preview window
+nnoremap <silent> K :call <SID>show_documentation()<CR>
+
+function! s:show_documentation()
+  if (index(['vim','help'], &filetype) >= 0)
+    execute 'h '.expand('<cword>')
+  else
+    call CocAction('doHover')
+  endif
+endfunction
+
 "NeoBundle 'eclim'
 "https://git.wincent.com/command-t.git
 filetype plugin indent on    " required
@@ -332,6 +344,13 @@ let g:NERDTreeDirArrows=0
 let g:NERDTreeMarkBookmarks = 0
 let g:NERDTreeMinimalUI = 1
 
+" * Signify
+let g:signify_realtime = 0
+let g:signify_vcs_list = ['git']
+let g:signify_sign_change = '~'
+let g:signify_sign_changedelete = g:signify_sign_change
+let g:signify_sign_show_count = 0
+
 " * VimFiler
 let g:vimfiler_tree_indentation = 2