ReactiveCocoa/ReactiveCocoa — pull request #612 by jspahrsummers (2013-06-23 16:42:01+00:00)
Title: Replace libextobjc submodule with a subtree

Since libextobjc rarely changes, this saves clone/update time. It also allows us to make modifications local to RAC, like namespacing the function in EXTScope to avoid symbol conflicts if another framework vendors libextobjc as well.