fix broken link in README.md

README.md

@@ -32,7 +32,7 @@ requirements
 * [CMake 2.8.6][cmk] or newer. The executable `cmake` should be on the system path.
 * [Visual Studio C++][vslstd], [MinGW][mingw] or [Cygwin][cgwn] under Windows.
 * [GCC][gcc] under Linux or OS X.
-* [Intel C++ compiler][icc] under Windows, Linux or OS X.
+* [Intel C++ compiler][intel] under Windows, Linux or OS X.
 * [Xcode][xcdt] developer tools package under OS X. This includes [Clang][clang].
 
 installation