Changes: Added changes for root tag improvements in IECoreUSD

Author: lucienfostier

Changes

@@ -1,7 +1,15 @@
 10.5.x.x (relative to 10.5.15.3)
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+Improvements
+-----
+
+- IECoreUSD: Added support for root level tags (reading/writing) to our IECoreUSD::SceneCacheData plugin.
+
+Fixes
+-----
 
+- IECoreUSD: Fixed crash when using invalid file path with IECoreUSD::SceneCacheFileFormat.
 
 10.5.15.3 (relative to 10.5.15.2)
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