[nemo-qml-plugins] Remove folderlistmodel.

This plugin has a new home.
[nemo-qml-plugins] Remove email.

This plugin now has a new home.
[nemo-qml-plugins] Remove qrencoder plugin.

Nothing has used this, and it has never worked, as nobody ever packaged
libqrencoder, despite introducing this plugin.
[nemo-qml-plugins] Remove configuration.

This plugin has a new home.
[nemo-qml-plugins] Split calendar plugin out.

It has a new home now.
[nemo-qml-plugins] Split time plugin out.

It has a new home.
[nemo-qml-plugins] Split alarms plugin out.

It has a new home now.
[nemo-qml-plugins] Split thumbnailer out.

It has a new home.
[nemo-qml-plugins] Split signon plugin out.
[nemo-qml-plugins] Split social plugin out.

It has a new home.
[nemo-qml-plugins] Remove signon packaging
[nemo-qml-plugins] Split accounts plugin out.

It has a new home.
[nemo-qml-plugins] Split notifications plugin.

It has a new home.
[nemo-qml-plugins] Disable sparql usage in contacts models