#16 change of syntax for plan patterns

[Rafael H. Bordini]

I wonder if instead of

{begin bc(goal(G),dg(goal(G)))}
...
{end}

it wouldn't make more sense to be

{begin bc(dg(goal(G)))}
...
{end}

or

{begin bc(goal(G),dg)}
...
{end}

or

{begin bc(dg,goal(G))}
...
{end}