Basic Identity Support

[n13]

• [ ] Load identity for each address - store in cache
• [ ] set identity for a user on sign on, or when create account... but I guess we also need to pay a fee for this, so maybe we have to wait until there's a balance... annoying!!

https://github.com/hashed-io/hashed-substrate/blob/5812b6ca38030c37dcb8d5336ffb69df5f7f03f1/docs/pallets-review/identity.md

[n13]

Implemented identity on send support

Added getIdentity method in polkadot repository

Not bothering with caching or anything now, we can use getIdentity as is for anywhere we want to show an account name.

Keeping in mind that identity may not be set.

We can also then show how trusted the identity is. All this is pretty complicated, needs to have a minimal UI.