Beta-2

This release contains a new, more flexible Runnable interface! This release is a breaking change.

The main changes are including a Ctx object in each call to a Runnable's Run instead of the previous doFunc. This Ctx contains its own Do func, allowing the same behaviour as before.

OnStart becomes OnChange, allowing for more lifecycle events to be handled by Runnables.

These changes set Hive up well for some powerful additions coming in the next few weeks.