Finished transitivity of propositions

src/main/scala/leon/codegen/runtime/SolverEntryPoint.scala

src/main/scala/leon/frontends/scalac/ASTExtractors.scala

src/main/scala/leon/frontends/scalac/CodeExtraction.scala

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

src/main/scala/leon/purescala/FunctionClosure.scala

.../scala/leon/solvers/templates/QuantificationManager.scala

...main/scala/leon/solvers/templates/TemplateGenerator.scala

src/main/scala/leon/solvers/templates/Templates.scala

src/main/scala/leon/solvers/templates/UnrollingBank.scala

src/main/scala/leon/solvers/z3/AbstractZ3Solver.scala

src/main/scala/leon/solvers/z3/Z3ModelReconstruction.scala