Start configuration for NERDTree plugin

config/92-nerdtree.vim

+" Open NERDTree automatically when vim starts up if no file specified
+autocmd StdinReadPre * let s:std_in=1
+autocmd VimEnter * if argc() == 0 && !exists("s:std_in") | NERDTree | endif
+autocmd VimEnter * if argc() == 1 && isdirectory(argv()[0]) && !exists("s:std_in") | exe 'NERDTree' argv()[0] | wincmd p | ene | endif
+
+" Map NERDTree to F2 key
+map <F2> :NERDTreeToggle<CR>
+
+" Close vim if NERDTree is the last open buffer
+autocmd bufenter * if (winnr("$") == 1 && exists("b:NERDTree") && b:NERDTree.isTabTree()) | q | endif