coin_symbol_from_mkey mapping xpub with currency not necessary true #115
Description
According to the _coin_symbol_from_mkey function the xpub for Litecoin should begin with characters Ltub but if I export pubkey from exodus wallet I get a key that begin with xpub and the function match this with btc or dash coin. By skiping this validation I was able to create a Litecoin hdwallet sucessfully.