added screenshot scripts to bind to my xfce4 shortcuts

bash/grab_screen.sh

@@ -0,0 +1,2 @@
+#requires scrot
+scrot '%Y-%m-%d_$wx$h_scrot.png' -e 'mv $f ~/Pictures/'

bash/grab_window.sh

@@ -0,0 +1,2 @@
+#requires scrot
+scrot '%Y-%m-%d_$wx$h_scrot.png' -u -e 'mv $f ~/Pictures/'