1.3.7    03.04.2018
           - refactor Logger XS API, export constants for log levels
1.3.6    08.02.2018
           - added CallbackDispatcher and NativeCallbackDispatcher
1.3.5    15.01.2018
           - fix build for perl with threads (PERL_IMPLICIT_CONTEXT)
1.3.4    12.01.2018
           - fix build for bleadperl - SvOK now is not boolean
1.3.3    28.11.2017
           - when calling clone from HOOK_CLONE, use the same dictinary as top call
1.3.2    11.05.2017
           - move C++ only parts to CPP::panda::lib, use CPP::panda::lib
           - move PXS_TRY, sv2string, sv2string_view to Panda::XS
1.3.1    13.03.2017
           - compile with all warnings enabled, fix warnings
1.3.0    11.02.2017
           - prevent MSWin "clone" hangs: prevent installation on Windows with SJLJ compiler
             (because perl breaks C++ exceptions in this case - perl just hangs on next "croak" after C++ exception)
           - refactor memory pools' thread_local implementation (use C++11 features)
           - full refactor of panda::string:
             panda::basic_string<...>, panda::string, panda::wstring, panda::u16_string, panda::u32_string
           - added std::string_view if c++ < 17
           - added std::from_chars, std::to_chars if c++ < 17
           - added panda::[unordered_]string_[multi](map|set) to support passing string_view to some methods for string keys
1.2.3    06.02.2017
           - bugfix in panda::string with external pointer assign
1.2.2    31.01.2017
           - added panda::lib::h2be16, h2le16, be2h16, le2h16, h2be32, h2le32, be2h32, le2h32, h2be64, h2le64, be2h64, le2h64
1.2.1    25.01.2017
           - make PXS_TRY a single block
           - added IteratorPair
           - removed MACRO 'INLINE' and 'THREAD_LOCAL'
           - removed macros likely/unlikely -> moved to panda::likely(), panda::unlikely()
1.2.0    17.01.2017
           - require c++11
           - add move constructors to panda::string, add std::hash for panda::string
1.1.6    13.01.2017
           - no visible changes
1.1.5    11.01.2017
           - added PXS_TRY macro helper for dealing with C++ exceptions (auto-rethrow perl exception)
1.1.4    03.03.2016
           - fix latest c++ warnings
1.1.3    15.07.2015
           - operator bool for panda::string
1.1.2    16.04.2015
           - make last param optional for merge and clone function (C++)
1.1.1    10.02.2015
           - docs improve, no code changes
1.1.0    05.02.2015
           - Change clone hook from CLONE to HOOK_CLONE, because CLONE is used on threaded perls at thread creation.
           - add second param $with_cross_check to 'clone' function. Add lclone method with behaves like clone($arg, 0)
           - docs/test changes
1.0.1    03.02.2015
           - bump version to require win32-friendly Panda::XS/Panda::Install
1.0.0    31.01.2015
           - fix threaded builds for NO_GET_CONTEXT
           - remove <algorithm> usage from panda::string, as it conflicts with perl headers under c++11
           - cosmetic
           - bump version to release
0.1.1    30.01.2015
           - Added public API MACRO-attributes 'INLINE' and 'THREAD_LOCAL' if not yet defined
           - Added MemoryPool, ObjectAllocator, AllocatedObject - fast memory allocators (thread-safe)
           - Fixed Win32 compilation & tests
0.1.0    31.10.2014
           - first release
