Matrix4 - Fix many sample code problems.
Occluder - fixes for sample code.
Display better error messages from node server.js

Also, the "server running" message was being displayed too early.
Merge pull request #2054 from PatMahoney/master

Matrix4 - Fix many sample code problems.
Merge pull request #2060 from AnalyticalGraphicsInc/node-error-msg

Display better error messages from node server.js
Create view-projection matrix in SceneTransforms instead of using the one computed by the uniform state which may cause the transformation to lag by a frame.
Merge pull request #2062 from AnalyticalGraphicsInc/scene-transforms

SceneTransforms view-projection matrix