Updating changes and bumped patch version

Author: andrewkaufman

Changes

@@ -1,3 +1,26 @@
+# 8.4.3
+
+#### IECore
+
+- Improved precision of Imath Vec and Color repr() and str().
+- Using mutex on all access to the internal directory nodes in StreamIndexedIO.
+- SceneCache attribute read is now thread-safe.
+
+#### IECoreMaya
+
+- Working around a bug in Maya for meshes with 6 or more UV sets.
+- Fixed precision issue in failing test case.
+
+#### IECoreHoudini
+
+- Improved Exception handling in Houdini SceneCache nodes.
+- Improved UI for Expand/Collapse buttons.
+- Fixed bug in CortexConverter SOP todo with multiple CortexObject primitives with the same name.
+
+#### IECoreNuke
+
+- Fixed a bug in the SceneCacheReader that was preventing animated scene caches from displaying properly.
+
 # 8.4.2
 
 #### IECoreNuke

SConstruct

@@ -52,7 +52,7 @@ SConsignFile()
 
 ieCoreMajorVersion=8
 ieCoreMinorVersion=4
-ieCorePatchVersion=2
+ieCorePatchVersion=3
 ieCoreVersionSuffix=""	# used for alpha/beta releases. Example: "a1", "b2", etc.
 
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