deprecation fix about qxmpp, beginning of adding email addresses in VCards

ui/widgets/vcard/CMakeLists.txt

@@ -0,0 +1,21 @@
+cmake_minimum_required(VERSION 3.0)
+project(vCardUI)
+
+# Instruct CMake to run moc automatically when needed.
+set(CMAKE_AUTOMOC ON)
+# Instruct CMake to create code from Qt designer ui files
+set(CMAKE_AUTOUIC ON)
+
+# Find the QtWidgets library
+find_package(Qt5Widgets CONFIG REQUIRED)
+
+set(vCardUI_SRC
+  vcard.cpp
+  emailsmodel.cpp
+)
+
+# Tell CMake to create the helloworld executable
+add_library(vCardUI ${vCardUI_SRC})
+
+# Use the Widgets module from Qt 5.
+target_link_libraries(vCardUI Qt5::Widgets)