Add deeper netrw support, including Git branch head and netrw sorting

options

autoload/airline/extensions.vim

@@ -20,7 +20,6 @@ endfunction
 let s:script_path = tolower(resolve(expand('<sfile>:p:h')))
 
 let s:filetype_overrides = {
-      \ 'netrw': [ 'netrw', '%f' ],
       \ 'nerdtree': [ 'NERD', '' ],
       \ 'gundo': [ 'Gundo', '' ],
       \ 'diff': [ 'diff', '' ],
@@ -128,6 +127,10 @@ function! airline#extensions#load()
     call airline#extensions#unite#init(s:ext)
   endif
 
+  if exists(':NetrwSettings')
+    call airline#extensions#netrw#init(s:ext)
+  endif
+
   if get(g:, 'loaded_vimfiler', 0)
     let g:vimfiler_force_overwrite_statusline = 0
   endif