Add an svg_cairo binding, not working for now.
Abstract over the type of streams.
Pack the engine into a functor parametrized by the type of the stream.
Change in the cli, remove the output option and integrate it to the various backend options, add a gtk option.
Pack the position of the turtle in a float record.
Begining of a combinator interface.
Add the BatSeq stream in the engine, now the default stream (2.5 time faster, with no optimisations).
Add Stream and LazyList, both are terribad, LazyList is *really* bad.
Merge branch 'master' of github.com:Drup/LILiS