Auditing record creation

[spficklin]

This issue imported from the Chado v1.4 requested changes google doc:

Requested by Lukas Mueller & seconded by Sook Jung (v1.4)

http://gmod.827538.n3.nabble.com/RFC-Chado-relase-v1-3-tp4048655p4048658.html

• Add timestamps for creation time (maybe also update) in the nd_experiment and stock (possibly project) tables?
  • Lacey says (4/24/2014): I also support this and have often wondered why features get this support but the rest of us don't ;) Looks like there is some pushback against this for wait till v1.4 until that can be sorted out?
• In breeding programs, people would like to know when and how many things have been added.
• Comment from 26 v. guignon: That should be the purpose of the Audit module or Chado Controller History module. I don't think we would need those in base tables as it would be used for traceability and the purpose of the audit/history modules are traceability. It would be redundant and require space and triggers to keep those up to date which would impact Chado performances

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