ATS2-0.2.0

## ats2-postiats-0.2.0:

    0.2.0

    This is the 23rd release of ATS2, the successor of the ATS
    programming language. The compiler for ATS2 is given the name
    ATS/Positats, ATS2/Postiats or simply Postiats.

    The official website for ATS is:

    http://www.ats-lang.org

    ATS-Postiats is hosted at github:

    https://github.com/githwxi/ATS-Postiats

    Major releases of ATS2 are available at:

    https://sourceforge.net/projects/ats2-lang/

    Major releases of external packages for ATS2 are available at:

    https://sourceforge.net/projects/ats2-lang-contrib/

    Here is a list of major additions and changes since the last release:

    1. Re-structuring CATS-parsemit
    2. Creating ATS-Postiats-frozen for storing inactive projects
    3. Porting Atscc2js based on the newly re-structured CATS-parsemit
    4. Porting Atscc2php based on the newly re-structured CATS-parsemit
    5. Porting Atscc2py based on the newly re-structured CATS-parsemit
    6. Porting Atscc2pl based on the newly re-structured CATS-parsemit
    7. Handling of HIPintrep is now supported
    8. Porting ATSLIB/libats/funmap_rbtree to ATS2 from ATS1
    9. Modifying jsonization of constraints to support ATS-extsolve
    10. ATS-extsolve-z3 (Z3-based ATS-extsolve) can now be put into use
    11. Performing occurs-checking before HYPObind(s2v, s2e) can be formed