Minor reorganization, and implementing trace-induct tactic

leon.out/Conqueue-edited.scala

library/annotation/package.scala

library/lazy/package.scala

src/main/scala/leon/verification/TraceInductionTactic.scala

testcases/lazy-datastructures/LazyMegeSort.scala

...ases/lazy-datastructures/Unproved/FibonacciMemoized.scala

testcases/lazy-datastructures/Unproved/HammingProblem.scala

testcases/lazy-datastructures/Unproved/ImplicitQueue.scala

testcases/lazy-datastructures/conc/ConcTrees.scala

testcases/lazy-datastructures/conc/Conqueue.scala