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