Deltachat

- parse ndn (network delivery notification) reports
and report failed messages as such 1552 1622 1630

- add oauth2 support for gsuite domains 1626

- read image orientation from exif before recoding 1619

- improve logging 1593 1598

- improve python and bot bindings 1583 1609

- improve imap logout 1595

- fix sorting 1600 1604

- fix qr code generation 1631

- update rustcrypto releases 1603

- refactorings 1617

- enable strict-tls from a new provider-db setting 1587

- new subject 'Message from USER' for one-to-one chats 1395

- recode images 1563

- improve reconnect handling 1549 1580

- improve importing addresses 1544

- improve configure and folder detection 1539 1548

- improve test suite 1559 1564 1580 1581 1582 1584 1588:

- fix ad-hoc groups 1566

- preventions against being marked as spam 1575

- refactorings 1542 1569

- new api for io, thread and event handling 1356,
see the example atop of `deltachat.h` to get an overview

- LOTS of speed improvements due to async processing 1356

- enable WAL mode for sqlite 1492

- process incoming messages in bulk 1527

- improve finding out the sent-folder 1488

- several bug fixes

- let `dc_set_muted()` also mute one-to-one chats 1470

- fix a bug that led to load and traffic if the server does not use sent-folder
1472

- fix endless loop when trying to download messages with bad RFC Message-ID,
also be more reliable on similar errors 1463 1466 1462

- fix bug with comma in contact request 1438

- do not refer to hidden messages on replies 1459

- improve error handling 1468 1465 1464

- always describe the context of the displayed error 1451

- do not emit `DC_EVENT_ERROR` when message sending fails;
`dc_msg_get_state()` and `dc_get_msg_info()` are sufficient 1451

- new config-option `media_quality` 1449

- try over if writing message to database fails 1447