Added really basic REST server

[propensive]

This introduces a very basic REST server for VS Code support.

Clone this repository, then build and install Fury with

make install

If Fury is already running stop it with,

fury stop

and check that no zombie processes remain with,

pgrep fury

If they do, run

killall fury

REST server

Start the new version of Fury by running any Fury command, for example,

fury about

The server should run as an HTTP server on port 6325. Currently it takes (but requires) only a single parameter, path, which specifies the working directory. Any request will respond with a JSON representation of the layer stored in that directory, if there is one.

Any sort of failure will return null, for now.

The server can be tested from the command line with, for example,

curl 'http://localhost:6325/layer?path=/home/work/path/to/some/project'

and checking the contents of the response.

Three endpoints are currently provided,

• /layer
• /hierarchy
• /universe
  for each of the three panels that should be displayed.