The full `LeonContext` is now passed to `Solver`s.

src/main/scala/leon/LeonContext.scala

src/main/scala/leon/LeonOption.scala

src/main/scala/leon/isabelle/Main.scala

src/main/scala/leon/solvers/ParallelSolver.scala

src/main/scala/leon/solvers/RandomSolver.scala

src/main/scala/leon/solvers/Solver.scala

src/main/scala/leon/solvers/TimeoutSolver.scala

src/main/scala/leon/solvers/TrivialSolver.scala

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

src/main/scala/leon/solvers/z3/FairZ3Solver.scala

src/main/scala/leon/solvers/z3/UninterpretedZ3Solver.scala

src/main/scala/leon/synthesis/ParallelSearch.scala

src/main/scala/leon/synthesis/SynthesisPhase.scala

src/main/scala/leon/testgen/TestGeneration.scala

src/main/scala/leon/verification/Analyser.scala

src/main/scala/leon/verification/Analysis.scala

src/main/scala/leon/verification/AnalysisPhase.scala

src/test/scala/leon/test/purescala/TreeOpsTests.scala

src/test/scala/leon/test/solvers/z3/BugWithEmptySet.scala

src/test/scala/leon/test/solvers/z3/FairZ3SolverTests.scala