CreateAccountMenu() is used to populate a BMenu with items corresponding
to the map of accounts provided to it― but when an account is disabled
or enabled, it can't update automatically.
A dedicated class, fAccountsMenu, now replaces it― it'll automatically
repopulate the list whenever the active accounts update.
The settings file-hierarchy has been changed a bit:
* Cardie/
* preferences
* Accounts/
* Cache/
* Accounts/
* Add-Ons/
`Cardie/Protocols` is now `Cardie/Accounts`, and the cache directory
has been split into two. `Cache/Accounts/` is for account-specific
cached data (e.g., cached roster icons, data, etc.), and
`Cache/Protocols` is for protocol-wide settings/data.
For purple, this will be used as the user's libpurple directory,
which has been moved from the default of `~/.purple` (yikes!)
Some plugin search-paths have been given to purple, too― lib
directories + "/purple2/", and Cardie/Cache/Add-Ons/purple/plugins/.
Jaidyn Ann