Add sdl2 and glfw examples. Build working for windows now

lib/include/GL/freeglut.h

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+#ifndef  __FREEGLUT_H__
+#define  __FREEGLUT_H__
+
+/*
+ * freeglut.h
+ *
+ * The freeglut library include file
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "freeglut_std.h"
+#include "freeglut_ext.h"
+
+/*** END OF FILE ***/
+
+#endif /* __FREEGLUT_H__ */