from now on you can specify a DecentHologram if you so please:
yes, it works even when hologram is false, because hologram is the default hologram.
2nd feature:
you can now make it drop an amount of items instead of just one.
this will make it drop 5 iron ingots per 20 ticks. This means that it will drop 5 at the exact same time.
This is how you do it!
/gen add <generatorname>:<amount> <material> ... etc
if no amount is specified it will default to 1, as expected.