Updated descriptions wanted for new tokens

closes #416

* make balances clickable on add liquidity page

* update formatting logic

* fix max slippage calculation

* New sUSD exchange and removed old sETH exchange

* checksummed sUSD

closes #443

closes #415

closes #401

* Add other TrueCurrencies

* reorder based on ticker

* Migration from old to new sETH exchange

* checksum addresses

* add rinkeby support

* add client-side routing link

* add TCAD and update TUSD address

* update TUSD uniswap exchange address

* query params for input and output currencies

* add slippage option

* add slippage cusytom param

* updated for sender address

* add field and amount support

* update params for pool page

* finish basic url support

* update app format

* update error checking to top level

* update for all pages

* fix build

* param updates

* fix slippage to basis points, update theme text, refactor to minimize lookups

* fix code styles

* update theme logic, remove extra setting, update rounding

* remove eslint comment errors

* remove logs, ignore lock

* remove lock

Ui updates

Merge branch 'beta' of https://github.com/Uniswap/uniswap-frontend into beta

make web3 connection logic more robust