`<Leader>gzo` doesn't support new `dirtree` plugin

[flyinggrizzly]

I've started using the new dirtree plugin and organizing notes into subfolders.

If a note is in a subfolder, <Leader>gzo isn't able to open it, instead trying to open the zettel's ID at the root of the Neuron project.

Based on some hacking with JS on the web interface, I think Neuron maintains a zettelPath in addition to the zettelID (it is at least available in /cache.json). So it may be a matter of looking up the path with the ID instead of just calling :e zettelID? I haven't had much time to look into how neuron.vim is interacting with Neuron in this case yet.

[srid]

zettelPath (actually Path now) is the only reliable place to get the relative path to a given zettel (relative to the directory passed to -d).