Multivalued deb init/upstart/default options

I misinterpreted
http://www.debian.org/doc/manuals/maint-guide/dother.en.html#initd - it
shouldn't take `foo.init` and turn it into `/etc/init.d/packagename`, it
should become `/etc/init.d/foo`, so packages can have multiple init
scripts (c.f. `nis` providing `ypbind`, `yppasswdd` etc.)

So, now, these are multivalued options, and they work independently of
the package name, as (I believe) should have been the case originally
- Add path mapping
  Behavior
    * some/file=/some/path
      Result: /some/path
    * some/directory=/some/path
      Result: /some/path/directory/...
- drop dependency on Rush
- version bump
Merge pull request #487 from doismellburning/deb-init-fixes

Multivalued deb init/upstart/default options