Create /var/www/.kgmatplotlib on install

Directory was /var/www/.matplotlib until
Karaage-Cluster/karaage-admin@e5364fe6a0e989baed20280c6205fc045a782fcf
changed this to /var/www/.kgmatplotlib

In addition, this package didn't create the directory. It only
added override permissions on the directory.
Version 1.1.3