"make uninstall" target

[gabuzi]

Hi,

I'm supporting a bunch of users with BART, and we noticed that it would be handy to have a make uninstall target that just undoes make install.
For now, I recommended to manually remove (assuming default $DESTDIR and $PREFIX):

• /usr/local/bin/bart
• /usr/local/share/doc/bart
• /usr/local/lib/bart

Anything I missed? I'd be happy to open a PR.

Cheers

[uecker]

I would accept a PR for an uninstall target. Thanks!