Pretty print aggregate exprs for easier reference
Change qualified call for imported ref only
Pretty print the offending query too
Include only offending clause in error message
Terminate the worker process more gracefully
Update worker to new GenServer
Cast primary key in `Repo.get/2`

Closes #290.
Fix Repo.update docs
Fix typos Ecto.Adapter docs
Mix.Tasks.Ecto -> Mix.Ecto
Merge pull request #294 from alco/patch-1

Fix typos Ecto.Adapter docs
Merge pull request #291 from thiagoarrais/pp-group_by-expr

Avoid relative names in group by error message