* Add blockContact and unblockContact subcommands
* Send blocked status in contacts sync
* Use only one method for blocking and unblocking
* Add blocking/unblocking for groups
* Prevent blocked messages from being printed
* Print blocked property in listContacts and listGroups commands
* Handle BlockedListMessages
* Store blocked state from incoming contact and group sync messages
* Minor changes and corrections
* Add block and unblock commands to man file (and also fix some headings of commands)
As Signal Desktop does not allow its users to update the contact names,
it would be nice to be able to update contact names from signal-cli when
the latter is the master device.
The command `setContactName` allow to set the name for the given contact
in the local store. `sendContacts` can then be used to push the updated
contact list on Signal servers.
Closes#228
Two new commands are added `setProfileName` and `setProfileAvatar` which
allow to update the name and avatar visible by other users for the
current profiles.
Closes#227
