Manually display nodes

Method to force display of nodes (main-thread affined). Added a sample project that will demonstrate how to manually display nodes. Removed the UIWindow layer pool hack.
Ya I wasn't crazy about this either. It's weird trying to get things to display in advanced w/out the containing view being laid out, since in ASTableView the width provided is the table's width. I'm fine killing this honestly if it's a bad practice. I'd rather keep the repo as clean as possible.