Add build script for Windows.

Fix build on Windows.

examples/viewer/README.md

@@ -1 +1,16 @@
-Simple .obj viewer with glew + glfw3 + OpenGL
+# Simple .obj viewer with glew + glfw3 + OpenGL
+
+## Build on Windows.
+
+### Requirements
+
+* premake5
+* Visual Studio 2013
+* Windows 64bit
+  * 32bit may work.
+
+Put glfw3 and glew library somewhere and replace include and lib path in `premake4.lua`
+
+Then,
+
+    > premake5.exe vs2013

examples/viewer/premake4.lua

@@ -0,0 +1,43 @@
+solution "objview"
+	-- location ( "build" )
+	configurations { "Debug", "Release" }
+	platforms {"native", "x64", "x32"}
+	
+	project "objview"
+
+		kind "ConsoleApp"
+		language "C++"
+		files { "viewer.cc", "trackball.cc" }
+		includedirs { "./" }
+		includedirs { "../../" }
+
+		configuration { "linux" }
+			linkoptions { "`pkg-config --libs glfw3`" }
+			links { "GL", "GLU", "m", "GLEW", "X11", "Xrandr", "Xinerama", "Xi", "Xxf86vm", "Xcursor", "dl" }
+
+		configuration { "windows" }
+			-- Path to GLFW3
+			includedirs { '../../../../local/glfw-3.1.2.bin.WIN64/include' }
+			libdirs { '../../../../local/glfw-3.1.2.bin.WIN64/lib-vc2013' }
+			-- Path to GLEW
+			includedirs { '../../../../local/glew-1.13.0/include' }
+			libdirs { '../../../../local/glew-1.13.0/lib/Release/x64' }
+
+			links { "glfw3", "glew32", "gdi32", "winmm", "user32", "glu32","opengl32", "kernel32" }
+			defines { "_CRT_SECURE_NO_WARNINGS" }
+
+		configuration { "macosx" }
+			includedirs { "/usr/local/include" }
+			buildoptions { "-Wno-deprecated-declarations" }
+			libdirs { "/usr/local/lib" }
+			links { "glfw3", "GLEW" }
+			linkoptions { "-framework OpenGL", "-framework Cocoa", "-framework IOKit", "-framework CoreVideo" }
+
+		configuration "Debug"
+			defines { "DEBUG" }
+			flags { "Symbols", "ExtraWarnings"}
+
+		configuration "Release"
+			defines { "NDEBUG" }
+			flags { "Optimize", "ExtraWarnings"}
+

examples/viewer/viewer.cc

@@ -8,6 +8,7 @@
 #include <iostream>
 #include <limits>
 #include <cmath>
+#include <algorithm>	
 
 #include <GL/glew.h>
 
@@ -19,6 +20,7 @@
 
 #include <GLFW/glfw3.h>
 
+#define TINYOBJLOADER_IMPLEMENTATION
 #include "../../tiny_obj_loader.h"
 
 #include "trackball.h"