Add CMake definitions (#79)

CMakeLists.txt

@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.11)
+set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+
+project(raygui C)
+
+# Config options
+option(BUILD_EXAMPLES "Build the examples." ON)
+
+add_subdirectory(src)
+
+if (${BUILD_EXAMPLES})
+  add_subdirectory(examples)
+endif()
+
+# TODO: Add automated testing.
+# enable_testing()