Added support of long long (issue #171)

Moved all build settings to `ArduinoJson/Configuration.hpp`
Added AppVeyor settings in source tree

include/ArduinoJson/Configuration.hpp

@@ -0,0 +1,79 @@
+// Copyright Benoit Blanchon 2014-2016
+// MIT License
+//
+// Arduino JSON library
+// https://github.com/bblanchon/ArduinoJson
+// If you like this project, please add a star!
+
+#pragma once
+
+#ifdef ARDUINO  // assume this is an embedded platform
+
+// store using float instead of double to reduce the memory usage (issue #134)
+#ifndef ARDUINOJSON_USE_DOUBLE
+#define ARDUINOJSON_USE_DOUBLE 0
+#endif
+
+// store using a long because it usually match the size of a float.
+#ifndef ARDUINOJSON_USE_LONG_LONG
+#define ARDUINOJSON_USE_LONG_LONG 0
+#endif
+#ifndef ARDUINOJSON_USE_INT64
+#define ARDUINOJSON_USE_INT64 0
+#endif
+
+// arduino doesn't support STL stream
+#ifndef ARDUINOJSON_ENABLE_STD_STREAM
+#define ARDUINOJSON_ENABLE_STD_STREAM 0
+#endif
+
+#ifndef ARDUINOJSON_ENABLE_ALIGNMENT
+#ifdef ARDUINO_ARCH_AVR
+// alignment isn't needed for 8-bit AVR
+#define ARDUINOJSON_ENABLE_ALIGNMENT 0
+#else
+// but must processor needs pointer to be align on word size
+#define ARDUINOJSON_ENABLE_ALIGNMENT 1
+#endif
+#endif
+
+#else  // assume this is a computer
+
+// on a computer we have plenty of memory so we can use doubles
+#ifndef ARDUINOJSON_USE_DOUBLE
+#define ARDUINOJSON_USE_DOUBLE 1
+#endif
+
+// use long long when available
+#ifndef ARDUINOJSON_USE_LONG_LONG
+#if __cplusplus >= 201103L || (defined(_MSC_VER) && _MSC_VER >= 1800)
+#define ARDUINOJSON_USE_LONG_LONG 1
+#else
+#define ARDUINOJSON_USE_LONG_LONG 0
+#endif
+#endif
+
+// use _int64 on old versions of Visual Studio
+#ifndef ARDUINOJSON_USE_INT64
+#if defined(_MSC_VER) && _MSC_VER <= 1700
+#define ARDUINOJSON_USE_INT64 1
+#else
+#define ARDUINOJSON_USE_INT64 0
+#endif
+#endif
+
+// on a computer, we can assume that the STL is there
+#ifndef ARDUINOJSON_ENABLE_STD_STREAM
+#define ARDUINOJSON_ENABLE_STD_STREAM 1
+#endif
+
+#ifndef ARDUINOJSON_ENABLE_ALIGNMENT
+// even if not required, most cpu's are faster with aligned pointers
+#define ARDUINOJSON_ENABLE_ALIGNMENT 1
+#endif
+
+#endif
+
+#if ARDUINOJSON_USE_LONG_LONG && ARDUINOJSON_USE_INT64
+#error ARDUINOJSON_USE_LONG_LONG and ARDUINOJSON_USE_INT64 cannot be set together
+#endif