Added paccache hooks

paccache-installed.hook

@@ -0,0 +1,12 @@
+[Trigger]
+Type = Package
+Operation = Remove
+Operation = Install
+Operation = Upgrade
+Target = *
+
+[Action]
+Description = Removing old installed packages from pacman cache...
+Depends = pacman-contrib
+When = PostTransaction
+Exec = /usr/bin/paccache -rk2

paccache-uninstalled.hook

@@ -0,0 +1,12 @@
+[Trigger]
+Type = Package
+Operation = Remove
+Operation = Install
+Operation = Upgrade
+Target = *
+
+[Action]
+Description = Removing uninstalled packages from pacman cache...
+Depends = pacman-contrib
+When = PostTransaction
+Exec = /usr/bin/paccache -ruk0