Improvement of files for SLAP 0.0.0 and new release of SLAP

This pull request contains

- improvement of description of SLAP 0.0.0,
- decrement of OCaml version required for SLAP 0.0.0 (4.00.1 -> 3.12.1), and
- addition of files for new release of SLAP (v0.1.0).