JSON-C - A JSON implementation in C - Win32 specific notes

## Windows specific notes for JSON-C

Please send Win32 bug reports to christopher.watford@gmail.com

Win32 Specific Changes:

- Various functions have been redefined to their Win32 version (i.e. `open` on win32 is `_open`)
- Implemented missing functions from MS's libc (i.e. `vasprintf` and `strndup`)
- Added code to allow Win64 support without integer resizing issues, this probably makes it much nicer on 64bit machines everywhere (i.e. using `ptrdiff_t` for pointer math)

Porting Changelog:

`printbuf.c` - C. Watford (christopher.watford@gmail.com)
  Added a Win32/Win64 compliant implementation of `vasprintf`
`debug.c` - C. Watford (christopher.watford@gmail.com)
  Removed usage of `vsyslog` on Win32/Win64 systems, needs to be handled by a configure script
`json_object.c` - C. Watford (christopher.watford@gmail.com)
  Added scope operator to wrap usage of `json_object_object_foreach`, this needs to be rethought to be more ANSI C friendly
`json_object.h` - C. Watford (christopher.watford@gmail.com)
  Added Microsoft C friendly version of `json_object_object_foreach`
`json_tokener.c` - C. Watford (christopher.watford@gmail.com)
  Added a Win32/Win64 compliant implementation of `strndup`
`json_util.c` - C. Watford (christopher.watford@gmail.com)
  Added cast and mask to suffice `size_t` v. `unsigned int` conversion correctness

This program is free software; you can redistribute it and/or modify it under the terms of the MIT License. See COPYING for details.