updated ipynb example such that 2kfs is performed on non-tested snps only
updated ipynb example such that 2kfs is performed on non-tested snps only

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