#40 flexible future reports

[Maurits van Rees]

There is now a 'report buildqueue' that gives an
overview of the next ten turns for a mostly a
starbase, but also a planet. It is really a short
version of the 'report base' and 'report economy' commands.
Maybe we can combine those.
Maybe we can make this more flexible by adding a turn
number and maybe planet number to those other options.
Example:
report economy 123 45 p P:
report the population for planet 123 in turn 45.

Or in a different way:
report buildqueue 123 economy p P