Updated faq (markdown)

faq.md

@@ -7,6 +7,17 @@ vim-plug does not require any extra statement other than `plug#begin()` and
 `syntax on` from your .vimrc as they are automatically handled by
 `plug#end()`.
 
+Since all the other major plugin managers store plugins in "bundle" directory,
+you might want to pass it to `plug#begin()` if you do not wish to reinstall plugins.
+
+```vim
+" For Mac/Linux users
+call plug#begin('~/.vim/bundle')
+
+" For Windows users
+call plug#begin('~/vimfiles/bundle')
+```
+
 ### Plugins are not installed/updated in parallel
 
 Your Vim does not support Ruby interface. `:echo has('ruby')` should print 1.
@@ -92,4 +103,4 @@ augroup load_us_ycm
   autocmd InsertEnter * call plug#load('ultisnips', 'YouCompleteMe')
                      \| call youcompleteme#Enable() | autocmd! load_us_ycm
 augroup END
-```
+```