BAR: add a storage amount to the resource bars

[beherith]

While the chili resource bars look great, they lack two basic points of information: current and max storage. It would be also nice if instead of delta resources, one could see production and usage. This is important because the passive builders and automatic energy conversion make the delta energy usage indicator unreliable.

[Bluestone]

You can lift the lua call for doing this from http://imolarpg.dyndns.org/trac/balatest/browser/trunk/luaui/widgets/gui_red_resourcebars.lua, see the updatebar function on line 283 ;)

[Funkencool]

The functionality is actually there pretty much I just forgot about this one. I'll commit in a minute.