Added nerdtree config

scripts/vimrc-config

@@ -35,3 +35,14 @@ set colorcolumn=80
 syntax enable
 set background=dark
 colorscheme delek
+
+" Start NERDTree when vim starts                                                
+autocmd StdinReadPre * let s:std_in=1                                           
+autocmd VimEnter * NERDTree | if argc() > 0 || exists('s:std_in') | wincmd p | endif
+                                                                                  
+" Close the tab if NERDTree is the only window remaining in it.                 
+autocmd BufEnter * if winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() | quit | endif
+                                                                                 
+" If another buffer tries to replace NERDTree, put it in the other window, and bring back NERDTree.
+autocmd BufEnter * if bufname('#') =~ 'NERD_tree_\d\+' && bufname('%') !~ 'NERD_tree_\d\+' && winnr('$') > 1 |
+    \ let buf=bufnr() | buffer# | execute "normal! \<C-W>w" | execute 'buffer'.buf | endif