[ZcF-general] zec-qt-wallet update

[adityapk]

This week
 - Released localized zec-qt-wallet in 3 languages - FR, PT and ES.
- Simple messaging with the ability to reply to messages and include a "reply-to" address
 - Several new features / bug fixes
   - Show if address is reused
   - Improve performance on the RPC calls
   - Several small bugfixes
- Update embedded zcashd to 2.0.2

Next week
- Continue working on perf, handle very large Txs