notes
* i tried to avoid the term "async", because that term is very
overloaded and we're not using e.g. tokio/async-io here
* i'm a little unhappy having to string the channel through the
parser, because that seems rather a part of the client logic than
parsing. on the other hand it's better than passing the whole
client, so there's that at least.
* First stab at structured types (#28)
Tests currently fail due to djc/imap-proto#2.
LSUB is also broken due to djc/imap-proto#4 (but we don't have tests for
that atm).
* Also parse out RFC822 fetch responses
* Make all the things zero-copy
* Also delegate IntoIterator for ZeroCopy ref
* Fix UNSEEN and LSUB
All tests now pass
* Address @sanmai-NL comments
* Correctly handle incomplete parser responses
* No need for git dep anymore
