Updated readme for GLM 0.9.4.1 release

readme.txt

@@ -36,6 +36,15 @@ GLM is a header only library, there is nothing to build, just include it.
 More informations in GLM manual:
 http://glm.g-truc.net/glm.pdf
 
+================================================================================
+GLM 0.9.4.1: 2012-12-17
+--------------------------------------------------------------------------------
+- Improved half support: -0.0 case and implicit conversions
+- Fixed Intel Composer Compiler support on Linux
+- Fixed interaction between quaternion and euler angles.
+- Fixed GTC_constants build
+- Fixed GTX_multiple
+
 ================================================================================
 GLM 0.9.4.0: 2012-11-18
 --------------------------------------------------------------------------------