Add CMake file and Makefile for `examples/build-gltf`

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 30cc854..1d76645 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,7 +6,8 @@
 
 option(TINYGLTF_BUILD_LOADER_EXAMPLE "Build loader_example" ON)
 option(TINYGLTF_BUILD_GL_EXAMPLES "Build GL exampels(requires glfw, OpenGL, etc)" OFF)
-option(TINYGLTF_BUILD_VALIDATOR_EXAMPLE "Build validator exampe" OFF)
+option(TINYGLTF_BUILD_VALIDATOR_EXAMPLE "Build validator example" OFF)
+option(TINYGLTF_BUILD_BUILDER_EXAMPLE "Build glTF builder example" OFF)
 
 if (TINYGLTF_BUILD_LOADER_EXAMPLE)
   ADD_EXECUTABLE ( loader_example
@@ -22,6 +23,11 @@
 if (TINYGLTF_BUILD_VALIDATOR_EXAMPLE)
   ADD_SUBDIRECTORY ( examples/validator )
 endif (TINYGLTF_BUILD_VALIDATOR_EXAMPLE)
+
+if (TINYGLTF_BUILD_BUILDER_EXAMPLE)
+  ADD_SUBDIRECTORY ( examples/build-gltf )
+endif (TINYGLTF_BUILD_BUILDER_EXAMPLE)
+
 #
 # TinuGLTF is a header-only library, so no library build. just install header files.
 #

README.md

diff --git a/README.md b/README.md
index 751f977..6d215a3 100644
--- a/README.md
+++ b/README.md
@@ -77,6 +77,7 @@
 * [glview](examples/glview) : Simple glTF geometry viewer.
 * [validator](examples/validator) : Simple glTF validator with JSON schema.
 * [basic](examples/basic) : Basic glTF viewer with texturing support.
+* [build-gltf](examples/build-gltf) : Build simple glTF scene from a scratch.
 
 ## Projects using TinyGLTF
 

examples/build-gltf/Makefile

diff --git a/examples/build-gltf/Makefile b/examples/build-gltf/Makefile
new file mode 100644
index 0000000..51c22f5
--- /dev/null
+++ b/examples/build-gltf/Makefile
@@ -0,0 +1,2 @@
+all:
+	$(CXX) -o create_triangle_gltf -I../../ create_triangle_gltf.cpp