Signed-off-by: Simon Lipp <laiquo@hwold.net>

flake8 --select W391,E302,E301,E304

autopep8 can't fix W391 even though it claims it can.
Fixed using a simple custom script.

Remove useless trailing \
Remove trailing spaces
Add missing empty lines

autopep8 -ir -j2 --select=E301,E302,E502,W291,W293,W391 .

Diff quickly checked.

Modules can raise this exception when they want to print errors to user

Laurent Bachelier authored Mar 22, 2012 and Romain Bignon committed Mar 23, 2012

Most backends don't set it nb_messages and no application used it.
No backends set nb_unread and only one application tried to use it.

This should help avoid useless fillobj() calls in some cases.

fixes #827

Laurent Bachelier authored Mar 22, 2012 and Romain Bignon committed Mar 23, 2012

It is unused, and no backend implemented it — so it was wrong to have it
in the function signature.
It also does not seem very helpful, we have get_threads() if we want to
do something advanced with treads.

fixes #825

While this changes constants names, I think it is important as "accused" is
complely wrong. E-mails use the term "Read-receipts" so I chose
to go with RECEIVED.

moved ICapDating.get_status() and ICapMessagesPost.get_status() into ICapAccount.get_account_status()