Changing Docs to reflect added functions add, addAt, replace, replaceAt, and remove.
Changing Docs to reflect added functions add, addAt, replace, replaceAt, and remove.

MasterJames/three.js,MasterJames/three.js,MasterJames/three.js,MasterJames/three.js,MasterJames/three.js,MasterJames/three.js