quetwo <> in flex-sdk

Revert to previous version to stop mustella tests from failing. Work will continue in seperate branch.

Updated ASDocs for XMLListAdapter

Minor changes to README and RELEASE NOTES. Grammar and formatting fixes.

Fixes FLEX-33428 -- Previous commit had a spelling mistake.

Testing GIT repo to see if it is broken.

Updates README and RELEASE_NOTES to include full bug list, grammar edits, version number updates and other textual updates to prepare for 4.10 release.

Fixes FLEX-33370. Refactors MAX_DRAG_RATE to be a protected variable so that it is extenable by other components.

Fixes FLEX-18697. Updated getCacheKey function per Justin's suggestion.

Fixes FLEX-18697. Check-in tests run, mustella passes.