amount should be included in render

[tracend]

Currently you'll have to calculate the axis before you can render

This is done by using amount

vis.gt( 5 ).amount().render();

Amount should be implied when you try to render so you don't have that constant extra step.

A flag like _amountSetup that's set when amount is executed and reset when a new query method is created will make sure that render isn't using outdated axis.