misc: copyright dates

cmake/cmake_uninstall.cmake.in

jami-gnome.appdata.xml

po/README

src/accountcreationwizard.cpp

src/accountcreationwizard.h

src/accountinfopointer.h

src/accountmigrationview.cpp

src/accountmigrationview.h

src/avatarmanipulation.cpp

src/avatarmanipulation.h

src/cc-crop-area.c

src/chatview.cpp

src/chatview.h

src/client.cpp

src/client.h

src/client_options.c

src/client_options.h

src/conversationpopupmenu.cpp

src/conversationpopupmenu.h

src/conversationsview.cpp