ASCII art!
Merged changes.
More accurate db API.
The `cache` command can optionally force resolve all pages.
Some basic error handling and performance timing for Witch.
Print logging to `stdout`.
Ability to debug SQLAlchemy.
Refactoring for better SQL abstraction and performance (hopefully):
- Page instances don't keep the SQL object. This make it simpler to share those
  instances between threads.
- Added a scheduler for running multiple page resolve operations. Sadly,
  multi-threading doesn't seem to help here.
- Updated SQLAlchemy to 0.9.3.