[README] add info and link to stable AUR package

Since version tags/releases have been  introduced lately, Arch users are
now able to choose between a 'stable' and a 'development' package.

Formatting changes, precision to TFA google

cloe #367

add Sina and Sohu Mail

rm mbsync requirement for online storage

the new script manually searches for environmental variables
so that it can work from a cronjob
and additionally searches for all Xorg displays on Linux
so that the display notification should appear correctly
no doubt there will be more bugs, but this is what the people want
and it's worth working out

update domains.csv

Fix mailboxes on macos

The Mac version of paste requires "-" to read from STDIN. Without "-", the "mailboxes" line in ~/.config/accounts/<email address>.muttrc is empty upon adding a new mailbox via `mw -a <email address>`. The Linux version of paste works fine if "-" is added.

Add USP-BR email

under the inbox is used for something else
closes #581

update domains.csv

cloeses #577 #572

- Fix formatting, typos, and make the format cohesive.
- Move LICENSE to defacto spot and more prominent
- Move dependencies sections to be a sub-section of the Install section since it was a bit confusing as to why the dependencies were after the Install section.

update domains.csv

Erciyes University, New Configurations

Erciyes University configuration is updated.