Can you make jsoncpp support C++ Builder by default?

[gzliudan]

According to Victor Chen's blog(http://www.cppfans.com/sdk/json/jsoncpp.asp), we can use jsoncpp under C++ Builder platform after below two steps:

1. move below lines to the end of class ValueIteratorBase in the file value.h

public:
ValueIteratorBase();
explicit ValueIteratorBase(const Value::ObjectValues::iterator& current);

2. add below lines to the file writer.cpp:

#if defined(__BORLANDC__)  
#include <float.h>
#define isfinite _finite
#define snprintf _snprintf
#endif

I have tested jsoncpp under C++ Builder XE5, XE6, XE7, it works fine. Thank victor chen for his smart work.

[cdunn2001]

Of course, we're fine with this change. But note that we cannot guarantee not to break "Borland" in the future. We have CI tests for gcc, clang, and vs only.

[gzliudan]

I only tested jsoncpp on C++ Builder 32 bit platform, not 64 bit. C++ Builder 64 bit can support C++11, 32 bit can't support C++11.