Bump version to 10.4.0.0a4 and update Changes

Author: johnhaddon

Changes

@@ -1,3 +1,15 @@
+10.4.0.0a4 (relative to 10.4.0.0a3)
+==========
+
+> Note : Changes marked with "(RB-10.3)" don't need to be mentioned in the release notes for the final release version of `10.4.0.0`. They are all inherited from `RB-10.3`.
+
+Fixes
+-----
+
+- USDScene : Fixed read/write of Color4f parameters, including component connections (RB-10.3).
+- ShaderNetworkAlgo : Added support for Color4f parameters in `add|removeComponentConnectionAdapters()` (RB-10.3).
+
+
 10.4.0.0a3 (relative to 10.4.0.0a2)
 ==========
 

SConstruct

@@ -58,7 +58,7 @@ ieCoreMilestoneVersion = 10 # for announcing major milestones - may contain all
 ieCoreMajorVersion = 4 # backwards-incompatible changes
 ieCoreMinorVersion = 0 # new backwards-compatible features
 ieCorePatchVersion = 0 # bug fixes
-ieCoreVersionSuffix = "a3" # used for alpha/beta releases. Example: "a1", "b2", etc.
+ieCoreVersionSuffix = "a4" # used for alpha/beta releases. Example: "a1", "b2", etc.
 
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