Envelope optimization
- Deterministic solver path with user-provided seed.
- Several bugfixes and smaller improvements.
- Envelope optimization for Potts, TruncatedLinear, TruncatedQuadratic.
- Ability to have individual cost functions per edge.
- Removed UNARY/PAIRWISE template parameters from solver, hiding these
internally. - Improved multilevel performance, even in the case of individual costs.
- Added GTest for automatic built instead of a hard dependency.