Installer: Board Email and newest User Error fixed

The database entries for the board email and the newest user were created to earlier.
Because of this, the entries were wrong.

Now they are created when the admin is created.

Also I have added `config.incomplete.php` to the *.gitignore*.

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Also I have fixed an error in the newssystem. It could not activated because the initital key in the **config** Database was missing.