add lodepng.c to simplify build process for c

lodepng.c

@@ -0,0 +1,31 @@
+/*
+Copyright (c) 2005-2015 Lode Vandevenne
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must not
+    claim that you wrote the original software. If you use this software
+    in a product, an acknowledgment in the product documentation would be
+    appreciated but is not required.
+
+    2. Altered source versions must be plainly marked as such, and must not be
+    misrepresented as being the original software.
+
+    3. This notice may not be removed or altered from any source
+    distribution.
+*/
+
+/*
+The manual and changelog are in the header file "lodepng.h"
+*/
+
+/*
+The cpp file also supports c
+*/
+#include "lodepng.cpp"

lodepng.cpp

@@ -25,7 +25,6 @@ freely, subject to the following restrictions:
 
 /*
 The manual and changelog are in the header file "lodepng.h"
-Rename this file to lodepng.cpp to use it for C++, or to lodepng.c to use it for C.
 */
 
 #include "lodepng.h"