- Moved OpenGL library wrapper into platform

- Finished reorganizing PLANNING.md

planning/CPP_LANGUAGE.md

@@ -5,7 +5,7 @@
 
 <!-- TOC -->
 * [Home](./CONTENTS.md#planning-documentation-for-fennec)
-* [C++ Language Library (`lang`)](#c-language-library-lang)
+* [C++ Language Library](#c-language-library-lang)
   * [Table of Contents](#table-of-contents)
   * [Introduction](#introduction)
   * [Implementation](#implementation)
@@ -27,7 +27,7 @@
 ## Introduction
 
 &ensp; This library contains headers and classes related to the C++ language. The  
-contents of this library are restricted to the Language Support, Diagnostics, and  
+contents of this library include the Language Support, Diagnostics, and  
 Metaprogramming libraries of the C++ Standard Library and Template Library.
 
 See: