Prepare the PersonaStore for use.
See Folks.PersonaStore.prepare.
| Folks.PersonaStoreError.STORE_OFFLINE |
if the store is offline |
| Folks.PersonaStoreError.PERMISSION_DENIED |
if permission was denied to open the store |
| Folks.PersonaStoreError.INVALID_ARGUMENT |
if any other error occurred in the store |
0.9.7