Get in features for 0.1.2

- Can now specify specific days of the week.
- Can now specify multiple times to trigger on a given day.
- Added ability to specify minutes as well as hour for timestamp.
- Expanded manipulation api; at sets to only the value specified, add
 includes a new criteria, remove deletes a criteria.

Caveats:

- Day of week ordering is unstable through serialization and
  deserialization.
- Equality semantics are not yet defined.