Define actions.

I started this branch to define one or two actions for "adjust", which we have used for things like beginning balances or inventory counts that differ from the system. But, trying to be as consistent as possible, I decided to use increment and decrement for these adjustments. Mostly because I couldn't think of one word actions for the adjust-up and adjust-down, and didn't want to use negative numbers instead of "decrement" behavior, since adjustments can go either way.

Then I decided we need to define more about actions anyhow, so I started that exercise. Note ? on use and work, because we haven't defined time-based resources in detail yet. As of now they just match what we already have defined.