Get ready GLM 0.9.2.1 release

readme.txt

@@ -13,6 +13,14 @@ 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-0.9.2.pdf
 
+================================================================================
+GLM 0.9.2.1: 2010-05-20
+--------------------------------------------------------------------------------
+- Automatically detect CUDA support
+- Fixed errors and warnings in VC with C++ extensions disabled
+- Fixed and tested GLM_GTX_vector_angle
+- Fixed and tested GLM_GTX_rotate_vector
+
 ================================================================================
 GLM 0.9.2.0: 2010-05-09
 --------------------------------------------------------------------------------