If you are renaming a file via the mm hotkey and it is already opened then all
tabs and windows containing the old file will be replaced with a
new file. Current tab and windows structure is not changed anymore

If you are deleting a file via the md hotkey and it is already open, i.e.
presents in buffer lists then a buffer will be removed but a window and tab
will be kept with a ':enew' file

Previously when you delete or moved a file via
md or mm commands the NERDTree was asking you about what to do
with the remaining buffer of the just deleted or moved file. I
always press 'y' in this cases so I've decided to add a new parameter,
NERDTreeAutoDeleteBuffer which you can set to 1 in order to skip
this confirmation.

- Reveal In Finder
 - Open with system editor
 - Quicklook

Current only when using MacVim under MacOSX

when copying a file outside the current tree root, {} is returned by
TreeFileNode.copy() so try to reposition the cursor

remove the old "OS" format option and introduce "UI" (which is the old
default)

now everything uses the equivalent of Path#str(0)