Support compton

Compton helps composite windows in X. This supports shadows, transparency, and
some other effects of which I'm unaware at the moment.

configs/shared/misc/.config/compton.conf

@@ -0,0 +1,14 @@
+# shadow
+shadow = true;
+shadow-radius = 7;
+shadow-offset-x = -7;
+shadow-offset-y = -7;
+
+# opacity
+menu-opacity = 0.8;
+inactive-opacity = 0.8;
+
+# transitions
+fading = true;
+fade-in-step = 0.03;
+fade-out-step = 0.03;

configs/shared/x_server/.xsessionrc.shared

@@ -23,6 +23,9 @@ clipmenud &
 # Start the Emacs server
 emacs --daemon
 
+# start comption
+compton &
+
 # set kbds
 xmodmap -e 'remove Lock = Caps_Lock'
 xmodmap -e 'keysym Caps_Lock = Escape'