tools(xml_tools): fixed `<div>` unwrapping + added `parse` instance: `<div>` unwrapping could fail when a text node was a sibling of the top element (could easily happen ith a `\n` line feed added by an editor). This is fixed by filtering on IElement with `elements()`. A `parse` instance has been added as it is not necessary to create a new `ElementParser` each time that we want to parse something.

#!/bin/sh

eval $(dbus-launch --sh-syntax)

# default, backend is launched in foreground
if [ $# -eq 0 ]
then
	exec sat fg
fi

# backend is launched with an explicit subcommand
if [ $1 = fg -o $1 = bg -o $1 = debug -o $1 = stop -o $1 = status ]
then
	exec sat "$@"
fi

# a whole command is specified
sat bg
exec "$@"