add window effects stub on how to launch and version.

source/3/3.2/3.2.15/users_and_groups.rst

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+Chapter 3.2.15 Users and Groups
+===============================
+
+USers and groups lets you manage users and groups on your system. 
+
+Version
+-------
+Lubuntu ships with version 0.13.0 of Users and Groups. 
+
+How to launch
+-------------
+To launch Users and groups from the menu -> Prefrences -> LXQt settings -> users and groups. From LXQt configuration center under system settings press the button that looks like two people. 

source/3/3.2/3.2.16/window_effects.rst

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+Chapter 3.2.16 Window Effects
+=============================
+
+Window effects is a program to manage effects of the Compton X compositor. 
+
+
+Version
+-------
+Lubuntu ships with version 0.4.0 of Window effects.
+
+How to Launch
+-------------
+To launch window effects from the menu -> Prefrences -> LXQt Settings -> Window effects or run compton-conf from the command line. From LXQt configuration center press the gear button with a c in it to launch Window Effects.