### Re-implements:
* min/max validators on initial currency swap selection
* polling of order status
* timer that persists across refreshes via localStorage (computed based on `createdTime` and `validFor` amount)
* swap persists across refreshes once order is created.
* various type refactors
### New additions:
* *SimpleButton* (can be PRd separately on request)
* clear loading state after order create (via SimpleButton and font-awesome)
* buffers for non-BTC swaps (bity does not actually accept 0.01 BTC worth of ETH as they claim they do in their JSON response, so a magic number of 10% is added to the minimum).
* Empty component, routes setup.
* Shared components for all Contracts inputs. Dont do anything yet.
* Check in reducer work so far. Still WIP.
* Header styling
* Check in input work so far, splitting to new branch.
* Strip down contracts inputs. Split out into form and explorer
* Contract selector
* Constantized config actions to use in contract saga.
* Interact explorer UI, no functionality
* Convert to constants, hook up errors
* Deploy and style cleanup.
* Remove unnecessary class.
* Fix flow errors with css modules
* Attempt at fixing all newly introduced flow errors in the contracts branch.
* Removed unused validator.
* Remove action constants, fix flow specificity in reducers
* Fix unit tests
* Move network contracts out of redux / sagas, and read directly from state with a selector in mapStateToProps.
* Fix initialState -> INITIAL_STATE rename
* foreach push -> concat
William O'Beirne
Daniel Ternyak