tried making naming more uniform and implemented most of the opengl managers

include/opengl/metadata/index_buffer_metadata.hpp

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <array>
+
+#include "GL/glew.h"
+
+namespace zgl
+{
+
+struct index_buffer_metadata
+{
+	GLsizei count;
+	GLenum index_type;
+};
+
+}