batch lookup WIP
batch invalidator.
batch resolver/invalidator.

This is still a WIP -- tests do not pass.
initialize correctly.
unit test with passes.
unnecessary stripping
comments
stop unbound.
spelling
let invokers worry about Queue.Empty exceptions
re-arrange mock object. empty test_flags by default/
Merge pull request #2 from SimpleFinance/batch_lookup

Batch lookup and invalidation