Adding post install & remove scripts for debian

deployment/kyoo.install

@@ -2,3 +2,7 @@ post_install() {
 	sudo -u postgres dropuser kyoo --if-exist
 	sudo -u postgres createuser -d kyoo
 }
+
+post_remove() {
+	sudo -u postgres dropuser kyoo --if-exist
+}

deployment/postinst

@@ -0,0 +1,5 @@
+#!/bin/sh
+set -e
+
+sudo -u postgres dropuser kyoo --if-exist
+sudo -u postgres createuser -d kyoo

deployment/postrm

@@ -0,0 +1,4 @@
+#!/bin/sh
+set -e
+
+sudo -u postgres dropuser kyoo --if-exist