Changes from Mercurial (hg https://foss.heptapod.net/isa-afp/afp-devel/ default)
Summary
- merged
- feat(Transport) add simpler function type introduction rule for extend
- feat(Transport) functions as binary relations, improved mono notation, make non-dependent relators definitions, generalise some concepts
- feat(ML_Unificaiton) repeated resolution tactics, tactics now proving theorems up to alpha (and not alpha-eta) equivalence, fix wrong bounded variables substitution