DSK: Put shebangs on the top of all of our scripts

That way syntax highlighting works

.config/dsk/run/xrdbupdate

@@ -1,3 +1,4 @@
+#! /usr/bin/env bash
 [ -r ~/.Xresources ] && xrdb ~/.Xresources
 for file in $XDG_CONFIG_HOME/xrdb/*.xresources; do
 	[ -r "$file" ] && xrdb -merge "$file"