Test release

make code safer in case of ABRs
make approximate matching run with unicode
remove hardcoded setting of C++98 in CMake files
strenghten rules for printf style functions in the interface: issue warnings on wrong format string parameter lists for gcc
adapt interface changes in strus core,analyzer and base
many CMake build fixes
added dependency to tre library for post matching of regular expressions (replacing boost regex, because of approximative matching capabilities)
added method to define and retrieve pattern lexer lexem or symbol name
hyperscan library as submodule