altered link to fastlmm website in readme
altered link to fastlmm website in readme

MicrosoftGenomics/FaST-LMM,MicrosoftGenomics/FaST-LMM,MicrosoftGenomics/FaST-LMM,zhonghualiu/FaST-LMM,zhonghualiu/FaST-LMM,zhonghualiu/FaST-LMM