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+2013-02-25 TyrUtils v0.5
+
+* New changelog to summarise changes in future
+* light and vis both now multithreaded on Unix and Windows platforms
+* vis now writes a state file every 5 minutes so it can resume if needed
+* qbsp and vis now support a form of detail brushes, similar to Quake 2. See
+  qbsp.txt for further details.