Remove added features for version 1.2.1

Author: peteroupc

camera.js

@@ -450,7 +450,6 @@ InputTracker.ENTER=13;
 InputTracker.TAB=9;
 InputTracker.SHIFT=16;
 InputTracker.CTRL=17;
-InputTracker.ALT=18;
 InputTracker.ESC=27;
 InputTracker.SPACE=32;
 InputTracker.PAGEUP=33;

glmath.js

@@ -75,28 +75,6 @@ return [a[1]*b[2]-a[2]*b[1],
 vec3dot:function(a,b){
 return a[0]*b[0]+a[1]*b[1]+a[2]*b[2];
 },
-/**
- * Adds two 3-element vectors and returns a new
- * vector with the result. Adding two vectors
- * is the same as adding each of their components.
- * @param {Array<number>} a The first 3-element vector.
- * @param {Array<number>} b The second 3-element vector.
- * @return {Array<number>} The resulting 3-element vector.
- */
-vec3add:function(a,b){
-return [a[0]+b[0],a[1]+b[1],a[2]+b[2]];
-},
-/**
- * Subtracts two 3-element vectors and returns a new
- * vector with the result. Subtracting two vectors
- * is the same as subtracting each of their components.
- * @param {Array<number>} a The first 3-element vector.
- * @param {Array<number>} b The second 3-element vector.
- * @return {Array<number>} The resulting 3-element vector.
- */
-vec3sub:function(a,b){
-return [a[0]-b[0],a[1]-b[1],a[2]-b[2]];
-},
 /**
  * Adds two 3-element vectors and stores
  * the result in the first vector. Adding two vectors