lt-paradigm doesn't support excluding compounds

I can see a full paradigm like this:

```sh
$ echo 'kage<*>' | lt-paradigm --analyser dan.automorf.bin
kage:kager
kage:kagers
kage:kagers-
kage:kagers
kage:kager-
kage:kager
kage:kagerne
kage:kagernes
kage:kagernes-
kage:kagernes
kage:kagerne-
kage:kagerne
kage:kage
kage:kages
kage:kages-
kage:kages
kage:kages-
kage:kages
kage:kages-
kage:kage-
kage:kage
kage:kage-
kage:kage
kage:kagen
kage:kagens
kage:kagens-
kage:kagens
kage:kagen-
kage:kagen
```

and exclude tags like this:

```sh
$ echo 'kage<*>' | lt-paradigm --analyser dan.automorf.bin --exclude '' --exclude '' --exclude ''
kage:kage
kage:kages
kage:kages-
kage:kage
kage:kage-
kage:kage
kage:kagen
kage:kagen
```

but it seems to ignore exclusions of the builtin compound tags:

```sh
$ echo 'kage<*>' | lt-paradigm --analyser dan.automorf.bin --exclude '' --exclude '' --exclude '' --exclude '' --exclude ''
kage:kage
kage:kages
kage:kages-
kage:kage
kage:kage-
kage:kage
kage:kagen
kage:kagen
```