CameraInfo.h

-Added flag isDepthCam

CameraInfo.cc

-Added ability for ogre to switch between normal rendering and depth rendering (implemented in DepthRenderListener and MaterialSwitcher)
-Added clause inside setupCamera to attach the depth cam to the regular camera's scene node (line 115)
-Added clause which sets appropriate rendering scheme if the camera is a depth cam (line 172)

ImageStreamDriver.h

-Added member variable sid which tells which image stream the images belong to

ImageStreamDriver.cc

-Added clause that calls decodePNGToDepth instead of decodePNG inside readImage (line 100)
-Changed all ImageHeader constructor calls inside readImage to use sid instead of 0 as their first arguments

ImageUtil.h

-Added function decodePNGToDepth

ImageUtil.cc

-Added function decodePNGToDepth. This function acts like decodePNG except that instead of copying the PNG, it reads the PNG and calculates a depth image from it.

MirageDriver.h

-Added a class DepthSubscription, which is an image subscription stream for depth images

MirageDriver.cc

-Added a second camera (line 215) which acts as the source for depth images
-Implemented DepthSubscription functions