removed old boost version made boost required

Gabriele Contini

2019-09-01 296baa1f2f26aa5fe711d154d557ca2a7d6f9b5d

 src/library/base/StringUtils.cpp

@@ -11,8 +11,9 @@
#include <string>
#include <cstring>
#include <algorithm>
#include <stdexcept>

#ifdef WIN32
#ifdef _WIN32
#include <time.h> //mktime under windows
#endif