Show line numbers, configure NERDTree and tagbar, fix spelling mistake

.vimrc

@@ -94,7 +94,7 @@ if has('langmap') && exists('+langnoremap')
   " compatible).
   set langnoremap
 endif
-" Use W to call sudo to write a read-only file with elevated privaliges
+" Use W to call sudo to write a read-only file with elevated privileges
 command W :execute ':silent w !sudo tee % > /dev/null' | :edit!
 au BufRead /tmp/mutt-* set tw=72
 
@@ -114,3 +114,18 @@ let c_space_errors = 1
 " This can be disabled with :e ++ff=dos
 set fileformats=unix
 
+" Show line numbers
+set number
+highlight LineNr ctermfg=darkgrey
+highlight LineNr ctermbg=black
+
+" NERDTree options
+nmap <silent> <leader>t :NERDTree<CR>
+let g:NERDTreeChristmasTree = 1
+let g:NERDTreeChDirMode = 2
+let g:NERDTreeHighlightCursorline = 1
+let g:NERDTreeMouseMode = 2
+let g:NERDTreeShowHidden = 1
+
+" Tagbar options
+nmap <F8> :TagbarToggle<CR>