ATS2-0.1.5

## ats2-postiats-0.1.5:

    This is the 14th 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. Supporting %(...) in macro definitions
       #define N 10
       #define N2 %(N + 1) // it is the same as: #define N1 11
       #define N2 %(N * N1) // it is the same as: #define N2 110
    2. Issuing an error message if the size of a stack-allocated array
       cannot be determined at compile-time.
    3. Fixing bug-2014-10-29 (see doc/BUGS), which caused an error in
       compiling embedded function templates.
    4. Improving ats2langweb/Implements.html
    5. Fixing bug-2014-11-14 (see doc/BUGS), which caused an error in
       compiling mutually tail-recursive functions
    6. Fixing bug-2014-11-14-2 (see doc/BUGS), which caused an error in
       compiling inner functions defined inside mutually tail-recursive
       functions
    7. Improving the implementation of ATSLIB/prelude/list_vt_mergesort
    8. Supporting compilation from ATS to Perl: atscc2pl
    9. Issuing the special comment #LINCONSTATUS==i to show the kind of
       an allocated constructor:
       i=0 => linear data constructor
       i=1 => nonlinear data constructor
       i=2 => nonlinear tuple constructor