added/modified tests; creates test objects and a test point light
removed constants that are no longer needed
minor variable name change
replaced the old initDepth() function with a new setupGLEnables() function which enables multiple OpenGL features at once
added debugging variable
minor debug value change
caught a bug where the glewInit() function causes the GL_INVALID_ENUM error
changed to reflect changes in other parts of the program
changed color used by glClearColor()
added a new function to check for OpenGL errors
Completed an implementation of phong lighting with point lights. Major changes made to support this so that the user is able to specify values for both lights and objects outside the shader. The user may add mulitple lights and objects to the scene.