When built with the ghcdebug flag and started with --debug=-1 (or -2
to pause at startup, or -3 to pause before exit), hledger can be
controlled by ghc-debug clients like ghc-debug-brick or a custom
ghc-debug query script.
Also, refactor version string code.
A simple web-based user interface for the hledger accounting system,
providing a more modern UI than the command-line or terminal interfaces.
It can be used as a local single-user UI, or as a multi-user UI for
viewing/adding/editing on the web.
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