Blockbook Server and Trezor Integration

We have setup a blockbook server and added a pull request to add support for Umbru with trezor hardware wallets (link below).
You can use the blockbook server as a second explorer, or even set you own one up if you wish. An electrum wallet will also be available shortly to use Umbru with your hardware wallets.

This is another step completed on our journey to expanding decentralization which you can follow the progress in #🔔umbru-announcements or check out our roadmap (https://umbru.io/#roadmap) for longer term planning.

 - Blockbook Server: https://blockbook.umbru.io/
 - Blockbook Code: https://github.com/umbru/blockbook
 - Trezor Support: https://github.com/trezor/trezor-firmware/pull/433

Another announcement will be made shortly with the Electrum wallet being released pending testing with compatibility with our multi asset wallet coming in the near future!