Implement configuration properties for dbus

Implement configuration properties for dbus

Closes #759

commit 169bb518bf6a43bd0bf14e1291f055017a5d5937
Author: John Freed <okgithub@johnfreed.com>
Date:   Fri Oct 15 08:53:34 2021 +0200

    remove org.asamk.signal.manager.api.Configuration

commit 27ecfee382f0f1402f452a9f5fb1079b2f9c9fc5
Author: John Freed <okgithub@johnfreed.com>
Date:   Fri Oct 15 08:40:13 2021 +0200

    add a DBus "daemon running" indicator

commit 94b3d9e2ed91b002751df0e04adba3cbc79e6bd1
Author: John Freed <okgithub@johnfreed.com>
Date:   Fri Oct 15 08:20:03 2021 +0200

    changing most DBus logger.info to logger.debug

commit 15da0601272db4b907bf94240b436667870cea87
Author: John Freed <okgithub@johnfreed.com>
Date:   Fri Oct 15 00:09:26 2021 +0200

    Configuration for Dbus and main

    Main program subcommand
    - fix logic to take into account previously unset flags
    - provide output in json and plain-text formats

    new Dbus Properties:
    - ConfigurationReadReceipts
    - ConfigurationUnidentifiedDeliveryIndicators
    - ConfigurationTypingIndicators
    - ConfigurationLinkPreviews

    removed getConfiguration and setConfiguration methods

    updated documentation

commit 09da3aae62d34de33b73dc53870090c23efe078a
Merge: 3c40b11 18ad9fb
Author: John Freed <okgithub@johnfreed.com>
Date:   Thu Oct 14 15:24:07 2021 +0200

    Merge branch master into dbus_updateConfiguration

commit 3c40b11b8a6a0619e92de6d54262966aee27fd5d
Merge: 8416d4a cadcc6c
Author: John Freed <okgithub@johnfreed.com>
Date:   Sat Oct 9 14:08:08 2021 +0200

    Merge branch master into dbus_updateConfiguration

commit 8416d4ac475af5c512d963bf79e62e933592e20a
Author: John Freed <okgithub@johnfreed.com>
Date:   Mon Oct 4 08:48:56 2021 +0200

    Dbus get/setConfiguration methods

    implement:

    - getConfiguration() -> [readReceipts<b>, unidentifiedDeliveryIndicators<b>, typingIndicators<b>, linkPreviews<b>] -> <>::

    - setConfiguration(readReceipts<b>, unidentifiedDeliveryIndicators<b>, typingIndicators<b>, linkPreviews<b>) -> <>::

    Update documentation