Return account address in Standard Ethereum Format

The address that MetaMask returns accounts[0] is not in the same format as stored on the blockchain.

From MM:
```
0xd034739c2ae807c70cd703092b946f62a49509d1
```

From the Blockchain:
```
0xD034739C2aE807C70Cd703092b946f62a49509D1
```

Please add the option to get the address in the Standard Ethereum Format.

Perhaps you already do this, and I missed it somehow, then I am apologize.

Start by tracing how accounts[0] is returned from MetaMask to determine where address formatting is selected. Compare the MetaMask address with the mixed-case blockchain example, then define and verify an option that returns the requested Standard Ethereum Format.

Written by the indexing model from the issue text.