Set up a new version of GHG Inventory

[nickwleo]

As as Inventory Manager or System Administrator I want to be able to set up a new version of the GHG Inventory so that the team can begin to work on a new version of the GHG inventory and retain a carbon copy frozen archive of the previous version.

Acceptance Criteria :

• All activity data and emissions figures and other notes, notations, justifications, assumptions, and calculated uncertainties, documentation, formulae/calculations/outputs etc for all sectors, categories, and greenhouse gases have been saved to an archive version or are copied to a new version without any loss of information. -The new version is editable. The archive version is not editable without the defined exception authorisation being provided by Inventory Manager or System Administrator only.

[densoutar]

Closed due to duplication of #27