* Add Get Accounts button
This button calls `eth_accounts`. This button is always enabled, even
when not connected.
* Disable account buttons by default
The buttons that require you to have first connected have been disabled
by default. Previously they would be enabled until the JavaScript
finished initializing the page, at which point they'd be disabled. This
resulted in a distracting flash as the page loaded and the buttons
changed.
The `signTypedData` button was added to the accounts button set as
well, rather than being left enabled regardless of connected status.
* Allow connect button to become re-enabled
The Connect button was broken previously in that after being disabled,
it would stay disabled even if the dapp lost access to MetaMask. The
button will now be enabled whenever not connected.
* Stringify signTypedData results
* Defer metamask onboarding bundle to speed up page load
Mark Stacey
812c546acd