Adds credit to Emil.

For implementing n64-fast32-engine

lib/src/guLookAtRef.c

@@ -1,11 +1,3 @@
-/*
- * This file originates from the standard Nintendo 64 SDK libultra src
- * directory, and it used exclusively when building with the Fast3DEX2
- * microcode. Not not using it breaks environment mapping.
- *
- * Apart from the modifications listed below, this file is unmodified.
- */
-
 /**************************************************************************
  *									  *
  *		 Copyright (C) 1994, Silicon Graphics, Inc.		  *

src/pc/README-n64-fast32-engine.md

@@ -0,0 +1,28 @@
+# About n64-fast32-engine
+
+sm64pc supports OpenGL through [n64-fast32-engine](https://github.com/Emill/n64-fast3d-engine/), by [Emill](https://github.com/Emill/).
+
+We recommend that you visit the repo if you wish for a better understanding on how this port was possible.
+
+n64-fast32-engine is licensed under
+```
+Copyright (c) 2020, Emill
+
+Redistribution and use in source forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. Redistributions in binary form are not allowed.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+```

tools/sdk-tools/README.md

@@ -1,2 +0,0 @@
-# sdk-tools
-Decompilation of the Nintendo 64 SDK developer tools