Locu/kronos — pull request #51 by marcua (2014-06-08 18:21:37+00:00)
Title: A cache to avoid recomputing computation on stable data.

This PR is best described by the documentation on the included `cache.py`. A summary of what went into it:
- a weeklong trip to Portland,
- ~14 food carts,
- ~5 coffee shops, and
- many miles of walking around.