Use Unidecode library to handle non-Unicode nicks (0.2.0 bump)

- The version number was changed to 0.2.0, purely because rpm doesn't
  like '0.2.0-pre' and I got tired of switching it around.
- We now use the Unidecode library to produce ASCII representations of
  non-ASCII names, making life easier for people with umlauts and such
  in their contact names.