Added Slang library entry on top of SlangListener library entry. Might be prudent to just get rid of the SlangListener library entry since it is a part of Slang, though maybe not.

Finally figured out why I was getting the most annoying error in the god damned world. Apparently AceLocale's NewLocale function doesn't return the locale table, but an in-between table that merely supports writing to, but not reading of, the actual locale table.

As such, my workaround is just to call L = AceLocale:GetLocale("Slang") once I've set up the initial table. And I do this because I want to have full access to the locale table so I can write functions within the localization file, in the locale table, that refer to it, because it'll make it easier to localize vastly different grammar rules.