All images have been moved to the /img/ folder in order to fully
separate qml from images. The .qrc file allows qml to use the images by
appending the qrc:/ prefix before the abstract path to the image.
Note that the .qrc file is also check at compile time, which further
enhances the confidence the lack of errors.
Some of the images are not used in the QML, but instead directly passed
through to the OpenVR API. These have not been added to the .qrc file.
Elements work like they've always done, this just moves the commonly
used components away from the global namespace.
The qmldir file still does something, although at this point it is
unknown exactly how it's used and whether or not it could be changed to
simplify imports across the block.
Vasily