Merge branch 'refactor-verification'

src/main/scala/leon/Extensions.scala

src/main/scala/leon/LeonPhase.scala

src/main/scala/leon/Main.scala

src/main/scala/leon/Pipeline.scala

src/main/scala/leon/Reporter.scala

src/main/scala/leon/Settings.scala

src/main/scala/leon/TestExtension.scala

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

src/main/scala/leon/plugin/AnalysisComponent.scala

src/main/scala/leon/plugin/ExtractorPhase.scala

src/main/scala/leon/plugin/LeonPlugin.scala

src/main/scala/leon/purescala/TreeOps.scala

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

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

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

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