added shell scripts to extract SNPs from VCF or IMPUTE files
added shell scripts to extract SNPs from VCF or IMPUTE files

bmvdgeijn/WASP,gmcvicker/WASP,smozaffari/WASP,bmvdgeijn/WASP,smozaffari/WASP,smozaffari/WASP,gmcvicker/WASP,smozaffari/WASP,gmcvicker/WASP,bmvdgeijn/WASP,bmvdgeijn/WASP,smozaffari/WASP,gmcvicker/WASP