Create a design draft from the current model

[Nagelfar]

To support iterative design a 'draft' version can be created. This draft version is based on the current model stored in Contexture and enables user to 'play' and iterate with it, without changing the original.

Ideas for creating a design draft:

• support a dedicated 'vision' or goal for the draft - as free text ('What do you want to improve with this draft?', 'What pain/gain are you solving?')
• support 'branching' or 'forking' from the current version (~git branches. Rebase to 'current' master)
• compare versions ('git diff', heuristics & patterns) as a support for decisions