Accept WIP that corresponds to uncompressed public key

The length from the WIP string should be either 51 or 52.

Line 52 in 433f246

if (address.length !== 52) {

A public key can be uncompressed or compressed:

The corresponding private key in WIP format may be 51 (uncompressed) or 52 bytes (compressed), according to:

The underlying validatePrivateKey function should handle either cases.

@hayeah resolved in PR194, will be part of next release