Using the submodules

As of https://github.com/camelot-project/frontend/pull/11, there is a database backend that will create a pull request with suggested changes whenever additions are made to the database.

In order to facilitate this, we have created submodules. These are exceedingly confusing bits of git hackery, but they are also very useful.

When you git pull upstream master after this branch has been merged, you will get an error message like:

error: Updating the following directories would lose untracked files in it: 
   database
   uploads

You will need to remove or rename these directories before you can pull. Just rename/remove them, then try to pull again.

AFTER THIS, there is another step

git submodule update --init

If you get another error, like, say, for example, maybe, fatal: destination path 'database' already exists and is not an empty directory..... then do the same as above: delete, retry.

(it might happen again for uploads... same deal)