2 alpha bug fixes. Removing describeType usage - despite only used once per type, it is too expensive. Restoring previous mechanism of traversing superclass definition chain, but refactoring so that we can support descendant selectors.
Also a quick fix for global id selectors.
SDK-17671 - [Advanced CSS] global id selectors are broken as of build 3639
SDK-17669 - Swf start up time is slow...