Enrich TypedFunDef/Lambda API a little

src/main/scala/leon/evaluators/RecursiveEvaluator.scala

src/main/scala/leon/evaluators/TracingEvaluator.scala

src/main/scala/leon/purescala/Common.scala

src/main/scala/leon/purescala/Definitions.scala

src/main/scala/leon/purescala/ExprOps.scala

src/main/scala/leon/purescala/Expressions.scala

src/main/scala/leon/repair/RepairNDEvaluator.scala

src/main/scala/leon/repair/RepairTrackingEvaluator.scala

...cala/leon/solvers/smtlib/SMTLIBCVC4QuantifiedSolver.scala

src/main/scala/leon/termination/ChainBuilder.scala

src/main/scala/leon/verification/DefaultTactic.scala

src/main/scala/leon/verification/InductionTactic.scala