1.3.0  09.02.2015
           - added xs::my_perl static per-thread variable which helps to deal with static init on threaded perls
             additionally, if you don't care about performance on threaded perls, you can do "using xs::my_perl" and remove pTHX
             from your function's definitions.
           - added mTHX/mTHXa C++ class helpers to store my_perl inside class' objects
1.2.0  08.02.2015
           - added on_svdup T_OEXT typemap class parameter to help supporting threaded perls.
           - added SVPayloadMarker<T>::marker, SVPayloadMarker<T>::get(), so that T_OEXT INPUT/OUTPUT performs slightly faster
           - doc changes
1.1.2  04.02.2015
           - fix C++ names clash on MacOS (do_open/do_close)
1.1.1  03.01.2015
           - bump version to require win32-fixed Panda::Install
1.1.0  31.01.2015
           - added XS_HV_ITER, XS_HV_ITER_NU, XS_AV_ITER, XS_AV_ITER_NE, XS_AV_ITER_NU marcos.
1.0.1  30.01.2015
           - PERL_NO_GET_CONTEXT requires explicit interp passing. fixed threaded builds
1.0.0  30.01.2015
           - make RefCounted a class again.
           - consider current version a stable release
0.1.9  30.01.2015
           - Fix working with C++ headers (marco vs functions conflicts) by defining NO_XSLOCKS and PERLIO_NOT_STDIO
             before including perl headers. All descendant modules must include <xs/xs.h> instead of XSUB.h, etc by hand.
           - ppport.h updated
           - internal tests compilation change
0.1.8  22.01.2015
           - compiler warnings fix
0.1.7  31.12.2014
           - added any_payload_attach, any_payload_detach, any_payload_exists, any_payload
           - change RefCounted from class to struct.
           - make IO & OIO typemaps better (now support GLOBREFS with IO slot as well)
0.1.6	 06.11.2014
           - added rv_payload_attach, rv_payload_detach, rv_payload_exists, rv_payload
0.1.5    31.10.2014
           - require perl 5.18.0 (earlier perls dont have required API)
           - added shared_ptr, Refcounted and docs
           - added typemaps for panda::shared_ptr and std::shared_ptr + tests
           - refactored all typemaps
0.1.4    10.10.2014
           - added hv_fetchhek, hv_storehek, hv_deletehek
0.1.3    10.10.2014
           - allow only RV to undef for obj2hv/obj2av, as perls < 5.20 don't allow to upgrade strings
0.1.2    09.10.2014
           - added support for HV* CLASS in object constructors (output typemaps)
0.1.1    08.10.2014
           - docs fixes
0.1.0    04.10.2014
           - first release