Misc: stoppaint_force & Documentation update

- Add stoppaint_force option, controlled via D-Bus, to stop painting
  completely, which may look better than unredirecting the screen,
  sometimes. (#41)

- Add x2, y2 matching targets.

- Update documentation.

compton.sample.conf

@@ -10,9 +10,10 @@ shadow-offset-y = -7;
 # shadow-red = 0.0;
 # shadow-green = 0.0;
 # shadow-blue = 0.0;
-shadow-exclude = [ "name = 'Notification'", "class_g = 'Conky'", "class_g ?= 'Notify-osd'" ];
+shadow-exclude = [ "name = 'Notification'", "class_g = 'Conky'", "class_g ?= 'Notify-osd'", "class_g = 'Cairo-clock'" ];
 # shadow-exclude = "n:e:Notification";
 shadow-ignore-shaped = false;
+# shadow-exclude-reg = "x10+0+0"
 
 # Opacity
 menu-opacity = 0.8;
@@ -25,8 +26,11 @@ alpha-step = 0.06;
 # inactive-dim-fixed = true;
 # blur-background = true;
 # blur-background-frame = true;
-blur-background-fixed = false;
+blur-kern = "3x3box"
+# blur-kern = "5,5,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1"
+# blur-background-fixed = true;
 blur-background-exclude = [ "window_type = 'dock'", "window_type = 'desktop'" ];
+opacity-rule = [ ]
 
 # Fading
 fading = true;
@@ -40,19 +44,20 @@ fade-exclude = [ ];
 backend = "xrender"
 mark-wmwin-focused = true;
 mark-ovredir-focused = true;
-use-ewmh-active-win = false;
+# use-ewmh-active-win = true;
 detect-rounded-corners = true;
 detect-client-opacity = true;
 refresh-rate = 0;
 vsync = "none";
 dbe = false;
-paint-on-overlay = false;
-sw-opti = false;
-unredir-if-possible = false;
-focus-exclude = [ ];
+paint-on-overlay = true;
+# sw-opti = true;
+# unredir-if-possible = true;
+focus-exclude = [ "class_g = 'Cairo-clock'" ];
 detect-transient = true;
 detect-client-leader = true;
 invert-color-include = [ ];
+# resize-damage = 1;
 
 # GLX backend
 # glx-no-stencil = true;
@@ -60,6 +65,7 @@ glx-copy-from-front = false;
 # glx-use-copysubbuffermesa = true;
 # glx-no-rebind-pixmap = true;
 glx-swap-method = "undefined";
+# glx-use-gpushader4 = true;
 
 # Window type settings
 wintypes: