* Use correct block explorer name and link in swaps when on custom network.
* Fix up custom etherscan link code in build-quote.js
* Use blockExplorerUrl hostname instead of 'blockExplorerBaseUrl'
* Use correct etherscan-link method for token links in build-quote
* Create correct token link in build-quote for mainnet AND custom networks
* Block explorer url improvements in awaiting-swap.js and build-quote.js
* Use swapVerifyTokenExplanation message with substitutable block explorer for all applicable locales
* Ensure that block explorer links are not shown in awaiting-swap if no url is available
* Swaps support for local testnet
* Create util method for comparison of token addresses/symbols to default swaps token
* Get chainId from txMeta in _trackSwapsMetrics of transaction controller
* Add comment to document purpose of getTransactionGroupRecipientAddressFilter
* Use isSwapsDefaultTokenSymbol in place of repeated defaultTokenSymbol comparisons in build-quote.js
Dan J Miller
Erik Marks
Brad Decker
David Walsh