Add vim folding documentation

.vimrc

@@ -459,6 +459,25 @@ let g:syntastic_quiet_messages = { 'regex': [
 " Maintain folds and cursor placement
 set viewoptions=cursor,folds,slash,unix
 
+" Vim folding commands
+" ---------------------------------
+" zf#j creates a fold from the cursor down # lines.
+" zf/ string creates a fold from the cursor to string .
+" zj moves the cursor to the next fold.
+" zk moves the cursor to the previous fold.
+" za toggle a fold at the cursor.
+" zo opens a fold at the cursor.
+" zO opens all folds at the cursor.
+" zc closes a fold under cursor. 
+" zm increases the foldlevel by one.
+" zM closes all open folds.
+" zr decreases the foldlevel by one.
+" zR decreases the foldlevel to zero -- all folds will be open.
+" zd deletes the fold at the cursor.
+" zE deletes all folds.
+" [z move to start of open fold.
+" ]z move to end of open fold.
+
 " FastFold by Enno settings
 nmap zuz <Plug>(FastFoldUpdate)
 let g:fastfold_savehook = 1