Issue: System Namespaces Not Required

When installing VaultWiki, it should no longer be necessary to set up 5 namespace forums. Right now if you don't, you get an error if you try to "Rebuild All Namespaces". What if I don't even want to use Books or Templates?

Made this change for the next build. Only builds the namespace (without complaining) when a forum was selected. Attempts to remove the editor buttons and FAQ entries for the missing namespaces. Removing the template namespace speeds up parsing because it doesn't look for templates to parse before the rest of the BB-Codes.