First (untested) name_list implementation.
Fix wallet transaction serialisation.
Fix IsMine handling of name scripts.

Optionally skip name prefix scripts in IsMine (similarly to retrieving
of addresses).  Use it to correct the "transferred" field in name_list.
Fix off-by-one error in expiration calculation.
Merge pull request #73 from domob1812/name-list

Implement name_list.