deliver latest and greatest Intel compilers as of 10Feb2013

tested and apparently working on my end.

```
sw@gaia-72:~/easybuild-easyconfigs/easybuild/easyconfigs/i$ icc --version
icc (ICC) 13.1.0 20130121
Copyright (C) 1985-2013 Intel Corporation.  All rights reserved.

sw@gaia-72:~/easybuild-easyconfigs/easybuild/easyconfigs/i$ ifort --version
ifort (IFORT) 13.1.0 20130121
Copyright (C) 1985-2013 Intel Corporation.  All rights reserved.
```

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>