Integrate dApp with eth-contract-metadata

[kelsos]

Description

https://github.com/MetaMask/eth-contract-metadata/ contains a list of contract metadata (including addresses, decimal, name, symbol and logo) that includes a lot of popular ERC-20 tokens

Acceptance criteria

• dApp shows the official logo for a token when right contract is detected.
• dApp first checks the token metadata from the library and then tries to read the contract if it is not found.

Tasks

• [ ]

[nephix]

This would be a great feature

[christianbrb]

There is a new option: https://uniswap.org/blog/token-lists/