added support for spawning an accession from and accession
added spawned message to locale
added a selenium test
removed unnecessary and erroneous removal of fourpart id from spawned accession
pulled pruning calls to a private method so the cloning behaviour can be overridden
a better way to test for the absence of elements
Merge pull request #774 from hudmol/spawn-accession

[Delivers  #69596924] Spawn accession