rearch 0.0.0-dev.4

A re-imagined declarative approach to application design and architecture

0.0.0-dev.4

• REFACTOR: move rearch impl to new file.
• FIX: flutter bug fixes and prototype todo list example app.

0.0.0-dev.3

• FEAT: add remaining side effects.

0.0.0-dev.2

• FIX: listener handle will not recreate manager on dispose.
• FEAT: initial impl of flutter_rearch.

0.0.0-dev.1

• FEAT: add == check to skip some rebuilds.
• FEAT: working mvp.