Feature request: account address book

[DaJaffaMan]

Currently the only option we have is to copy and paste wallet addresses into a text box which isn't ideal for most users, a more user friendly and recognisable (in the sense that we can translate an address belongs to person X) approach could be users maintaining their own address books. This way, when users are sending frequent transactions it's a lot easier to keep sending the currency to known associates by selecting from a list.

Thoughts?