(cleanup) Removed unnecessary code.
(feat) Persistent and Config.
(feat) Added Plugin implementations for Persistent and Config.
(feat) Constructors.
(refactor) Refactored to State, Read, and Write.
(cleanup) Reordered type params in constructors.
(feat) Updated hitcounter example.
(doc) Documented the new Persistent.
(fix) Updated for new constructor names.
(cleanup) Removed outdated tests.
Merge pull request #24 from iron/refactor/new-iron

(refactor) Refactored to work with new Iron