Manual issuances

this PR adds support for TX-54 TX-55 and TX-56.

Additionally, an RPC call "getgrants_MP" was added that will show historical grants/revokes of TX-54 smart properties.

A testing branch 'manual-issuances-testing' is available in wanderingbort/mastecore.  It is not linked in to this PR because it depends on the rawtx PR for getting the transaction in and out.