Merge branch 'develop' of github.com:hpcugent/easybuild-framework into develop
fix fftw3x_cdft lib name for recent Intel MKL
only add fftw3x_cdft for Intel MKL 10.3 and up
Merge pull request #579 from boegel/intel_fftw

fix use of fftw3x_cdft library for old/new Intel MKL versions