Bump version to 0.2.0

Add '#' on all <a>

"Transaction Details" viewable any time

Switch order from "to" and "amount" fields on Signer screen

fix: Relates to #138. Prevents user from importing account that is already in account list

feat: Fixes #308. Change amount font size on Send page to fit in input field

- Add option to import a Parity Signer account. It is then stored in
local storage.

- Send transactions with Parity Signer accounts

- Refactor sendStore so that "token" (and chainId) is inside this.tx;
avoids having to pass `token` around every function, and it makes sense
to put it in the object since it is part of the tx info.

- Add account type (either node or signer) to accountsInfo

- Add account type to withAccount; output props are now `{account:
{address, type}}` instead of `{accountAddress}`

feat - Fixes #293. Shows tx fee estimate and total tx amount. See issues in commit details

* Move toggle details buttons and associated methods and showDetails state into nav of TxForm component

* Pass showDetails down as props to TxDetails

* Remove previous attempt to display TxDetails like a popup above other fields
(i.e. remove form-details-wrapper and -details-value styles)