add methods for pre-limited resultsets

[rjbs]

This adds:

• account_rs
• global_rs
• account_rs_including_inactive
• global_rs_including_inactive

It also adds Ix::DBIC::AccountResult, for a result class that is not an entity but does have an accountId field and should be able to provide account_rs* methods.

These methods provide recordsets for the named collection, but also add stipulate whether isActive must be true and whether accountId must match the account of the invocant.

In general, all Ix applications should be writable with limited, if any, recourse to calling resultset directly.

[wolfsage]

Looks good. Should bakesale tests be updated?

[mmcclimon]

What he said. 👆

[rjbs]

I will add straightforward tests for these, but for now am relying on the way that downstream tests them.