Add vanity address generator to tools

[JonPizza]

Requires ravenrpc==0.2.4

usage:

python vanity_address_gen.py ( rpcuser ) ( rpcpass ) ( prefix ) ( ignore_case=True )

[blondfrogs]

This script might work however, because it uses the ravencoin daemon to create new addresses over and over. It will fill the wallet.dat with unused addresses in the hopes that it can find a vanity address. This isn't the type of vanity address generation we want to add to the repo.

I would suggest using a different type of library that generates private keys and addresses outside of the wallet.dat environment. Once you find a vanity address. You wouldn't import into your wallet.dat, and then you would want to make sure you back up the wallet.dat

[TronBlack]

Here's a fast VanityGen that supports Ravencoin addresses.

https://github.com/TronBlack/vanitygen-plus