Merge pull request #1214 from selenamarie/alembic-to-prod

Move alembic to prod
Add some comments, and tweak some documentation.
"function" isn't a keyword (or even a built-in).
"pass" here doesn't do anything or inform anyone.
Pass TaskThreads just the queue; they don't need the whole containing manager, and it's a Law of Demeter violation.
Merge pull request #1215 from erikrose/task-thread-tweaks

Task thread tweaks
bug 867606 add data dictionary

This adds a data dictionary that describes breakpad data and the transforms
applied by things like the Processor in Socorro.

Also cleaning up some stray sqlalchemy files no longer needed.