ReactKit/ReactKitCatalog — pull request #1 by inamiy (2014-12-16 00:59:45+00:00)
Title: Fix crash in release-build.

Fixed a crash bug in release-build.
(`x as String` didn't work properly when `x` is `Optional>`)

But there still seems to have Swift compiler bug when release-building...

1st hint from: https://github.com/ReactKit/ReactKit/commit/36fa3ce05e590ec405db86b37977b5712bba3769#commitcomment-8973134,