update the readme

[Robin-Haupt-1]

document the settings options (like choosing which way to display the paths, excluding folder)

make it so interested users know everything they need to know about the plugin without having to download and try the plugin themselves

tidbits to add:

• every note can have several parents if the paths are the same length

[Robin-Haupt-1]

it might help to highlight important terms (make the text bold)

[rbenson]

I would also add either an example of what the structure looks like in the file explorer pane, and/or a small directory of what the technology file(s) look like.