Moved datagen and grammers out of Inox

build.sbt

src/main/scala/inox/Main.scala

src/main/scala/inox/datagen/DataGenerator.scala

src/main/scala/inox/datagen/GrammarDataGen.scala

src/main/scala/inox/datagen/ModelEnumerator.scala

src/main/scala/inox/datagen/SolverDataGen.scala

src/main/scala/inox/grammars/AllGrammars.scala

src/main/scala/inox/grammars/Aspects.scala

src/main/scala/inox/grammars/BaseGrammars.scala

src/main/scala/inox/grammars/ClosureGrammars.scala

src/main/scala/inox/grammars/ConstantGrammars.scala

src/main/scala/inox/grammars/ElementaryGrammars.scala

src/main/scala/inox/grammars/EqualityGrammars.scala

src/main/scala/inox/grammars/ExpressionGrammars.scala

src/main/scala/inox/grammars/FunctionCallsGrammars.scala

src/main/scala/inox/grammars/GrammarsUniverse.scala

src/main/scala/inox/grammars/Labels.scala

src/main/scala/inox/grammars/Productions.scala

src/main/scala/inox/grammars/SimpleExpressionGrammars.scala

src/main/scala/inox/grammars/Tags.scala