updated readme for release

readme.txt

@@ -36,6 +36,12 @@ 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 0.9.2.6: 2011-10-01
+--------------------------------------------------------------------------------
+- Fixed half based type build on old GCC
+- Fixed /W4 warnings on Visual C++
+
 ================================================================================
 GLM 0.9.2.5: 2011-09-20
 --------------------------------------------------------------------------------