Fix lintian E: source-ships-excluded-file
Current debian/sid contains vendor/*.
It should not be bundled.
Repack archive and import it.
uscan command helps you to repack.
```
$ uscan --download-current-version
```
Then, import generated archive again.
```
$ gbp import-orig ../(generated archive)
```
After that, edit debian/changelog version to 0.9.4+ds-1.
(We need to discuss further more about appropriate versioning)
issue