Ross Nicoll 6b775ebd4d Replace named timestamping authority with notary
As the timestamping authority is now always the notary service, contracts should
no longer be using name-based lookup of the timestamping authority (as this will
generally be wrong). This introduces a new "timestamp" property on a transaction,
and updates most contracts to refer to it.

In some cases (IRS, CommercialPaper) there are transactions with no input states
to derive notary from, that use timestamps. In these cases a notary is specified
in the command.
2016-07-11 14:54:36 +01:00
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