Hello John,

Thank you for the new feature 'virtual buffers' to ido.el in the devel
repo. I have been using a similar feature locally but since discovered
your patch, I switched to it.

Here are three patches that add three features:

1. make it possible to toggle the use of virtual buffers. Bind the
   command to C-o when switching buffer (o for 'old' buffers).

2. handle files with same base names by appending one level of parent
   directory. Some files may still be ignored but the chance is much
   slimmer.

3. automatically bring in virtual buffers when user input doesn't match
   existing ones.