Updated readme

readme.txt

@@ -65,7 +65,8 @@ http://glm.g-truc.net/glm.pdf
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 GLM 0.9.7.0: 2015-XX-XX
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-
+Improvements:
+- Changed usage of __has_include to support Intel compiler #307
 
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 GLM 0.9.6.2: 2015-01-XX