1. DONE: Renames.
2. DONE: Moves.
3. IN PROGRESS: move to sensible namespaces / rename more logically.
4. Figure out if some databases need to have content renamed (Plugins?)
Changes:
* Everything is at least renamed from `LSG`, `:lsg` to `Nola`, `:nola`, `lsg_{dir}/` to `nola_{dir}/`
* `beautte`, `ircbot` naming has been as well removed
* Brand ("Nola") naming can now be configured in `:nola, :brand`
* Owner of the bot is now defined (in `:nola, :brand`)
* Improved `!version`
* `LSG.IRC` (the plugin namespace) is now correctly named: `Nola.Plugins`
* Plugins no longer have a `Plugin` prefix: `LSG.IRC.TxtPlugin` is now `Nola.Plugins.Txt`