Include hippodrome diagram.
Instructions for building and testing hippodrome.

We have a somewhat idiosyncratic setup here.
Link to longer API document.
Change side effect to deferred task in readme.
Describe Actions.
Starting at the left of the diagram...
Use :: instead of .prototype.
Document dispatcher.
Merge branch 'master' into docs
More documentation.
Finish Store API docs.
Start documenting tasks.
Finish documenting tasks.
Merge branch 'docs'
Clarify when Tasks run.
Lets tasks take multiple actions.