move derivations from Yii core classes to separate sub-directory so
they're easier to distinguish
create a custom client script implementation which can ignore requests
to register files. This way we can bundle some of the scripts and
styles that Yii automatically registers and thus save about five
requests on the initial load. The styles for CListView have been
modified to use our own loader.gif instead of the default one.
change the meaning of Season->getDisplayName() to better suit the most
common use case
use getArtwork() instead of the thumbnail property directly