Added input manager and license.

src/file/asset.c

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2021 Dominic Msters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
 #include "asset.h"
 
 char * assetStringLoad(char *assetName) {

src/file/asset.h

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2021 Dominic Msters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
 #pragma once
 #include <stdbool.h>
 #include <stdio.h>