lazily updated README, good enough for now

README.md

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+#uicache
+
+This is the tvOS specific version of uicache, it has very little in common with its iOS predecessor. It is pretty heavily documented throughout the code itself, and i'm super busy getting other nitoTV / greeng0blin release stuff sorted.
+
+you won't need to install this yourself, or even really build it yourself. its here for informational purposes only, and because I said i'd open source it for those who are curious how it works.