### 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).
* Convert Swap to consistent style
* Generate wallet reducer cleanup.
* Confirm empty action in swap reducer
* Union types. Fix gen wallet collision
* Fix not using all actions in reducer. Added reducer state for is fetching from bity. Added todo to make that a loader.
* Readme instructions.
* Remove common action constants.
* Bring all actions and reducers inline with readme instructions.
* Readme fixes
* address comments
* add types for swap action creators (and separate out to separate module)
* DRY up swapInformation and onGoingSwapInformation -> SwapInfoHeader.
* stop bity rate loading when Swap will unmount
* split out SimpleDropdown to separate module
* various additional refactors
Daniel Ternyak
William O'Beirne