* 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
* 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