* Generating transaction ,placing into read only textareas.
* Fix async wallet getAddress cases.
* Chain id from network
* remove leftover console log
* Check balance before generating transaction.
* Translate error msgs, check for invalid address.
* Errors for gas limit and gas price issues.
* relayout rpc code, start contract helper
* Dont ask for estimate if theres no value
* Split out conversion of ether to wei hex into lib function.
* big.js -> bignumber.js
### 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).
William O'Beirne
Daniel Ternyak