Merge pull request #194 from samarion/bags

build.sbt

library/lang/Bag.scala

library/lang/Set.scala

library/theories/Bag.scala

library/theories/String.scala

src/main/java/leon/codegen/runtime/Bag.java

src/main/java/leon/codegen/runtime/BigInt.java

src/main/java/leon/codegen/runtime/Set.java

src/main/scala/leon/codegen/CodeGeneration.scala

src/main/scala/leon/codegen/CompilationUnit.scala

src/main/scala/leon/datagen/VanuatooDataGen.scala

src/main/scala/leon/evaluators/RecursiveEvaluator.scala

src/main/scala/leon/evaluators/StreamEvaluator.scala

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

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

src/main/scala/leon/purescala/DefinitionTransformer.scala

src/main/scala/leon/purescala/ExprOps.scala

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

src/main/scala/leon/purescala/Extractors.scala

src/main/scala/leon/purescala/PrettyPrinter.scala