skeleton of a new lesson on recursive strings
Give the parameter types to BatExercise::templatePython()

I sometimes need to convert these parameters from the java world to
the python one, and I need to know when that's needed.
show the scala compiled code when debug is enabled
properly deal with List[Int] parameters in templating exercises
first working exercise for the recursion.cons lesson
add the recursion.cons to the picture
deal with the logos of the new world and lesson
display executed code in debug mode
rename to match the name used in Python
Whole load of shit to allow ConsExercises to build RecLists
kill dead code
allow BatExercises to expect null as a value + cosmetics
document that fucking world
Add the missing bits of documentation for these exercises
Mark the newly created files as translatable
document last changes