Add 'vim-unstack' plugin

Testing this plugin out. The hope is that it will allow me to quickly
open the relevant bits of code from a stack trace. This also works
without a `makeprg` so I could use if for Django stack traces for
example. Still trying to get it to work.

1 files changed, 0 insertions, 0 deletions

diff --git a/bundle/vim-unstack b/bundle/vim-unstack
new file mode 160000
+Subproject a6c562fd2582fc8258b72ced0011ac2e6eb8152