#378 More parameters for CIF data-based synthesis variable ordering algorithms

• Generalize to allow mix of legacy and linearized hyper-edges/graphs:
  • Add RelationsKind to configure legacy vs linearized relations.
  • VarOrdererHelper has representations per RelationsKind.
• Parameterize metrics for different relations:
  • Move metrics out of VarOrdererHelper (a class per metric).
  • More functionality from VarOrdererHelper in the metric classes.
  • Parameterize metrics with RelationsKind.
• Debug output for different metric kinds:
  • VarOrdererHelper: dbgMetrics per RelationsKind.
• Parameterize variable orders with metrics and relations kinds:
  • ChoiceVarOrderer: relations kind.
  • DcshVarOrderer: metric, relations kind.
  • ForceVarOrderer: metric, relations kind.
  • ReverseVarOrderer: relations kind.
  • SlidingWindowVarOrderer: metric, relations kind.
  • SloanVarOrderer: relations kind.
  • WeightedCuthillMcKeeVarOrderer: node finder, relations kind.
• Moved defaults to CifToSynthesisConverter.
• Some other improvements:
  • Fix: LinearizedHyperEdgeCreator must not extend LegacyHyperEdgeCreator.
  • Aligned hyper-edges and graphs in CifToSynthesisConverter.
  • Moved hyper-edge creators to separate package.
  • Moved variable ordering metrics to separate package.
• Note that:
  • These changes are backwards compatible for the user.
  • There are no options yet to exploit the new possibilities. (that will be a separate merge request)
  • The base orderers have not been made into separate classes.

It is probably easiest to review this per commit.

Addresses #378 (closed)