add header

vec3/vec3.d.ts

@@ -1,3 +1,8 @@
+// Type definitions for Vec3 Librairy
+// Project: https://www.npmjs.com/package/vec3
+// Definitions by: Xavier Stouder <https://github.com/xstoudi/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
 declare module "vec3"{
     class Vec3{
         constructor(x: number, y: number, z: number);