Merge pull request #1 from newcolabs/biba

initial set of changes to get LW working in the Biba environment
Merge pull request #2 from newcolabs/dj

add delayed job support to logweasel
Merge branch 'biba'
account for in-process workers in the logweasel plugin

if the application sets `Delayed::Worker.delay_jobs` to `false` then jobs
are invoked in the same process where they are enqueued. in this scenario
the enqueue callback is never invoked. but that's okay because if we're
in-process we probably already have a logweasel transaction.