Consistent reference and GATK versions

[joshuashen]

Updated GATK:
/ifs/home/c2b2/ip_lab/yshen/usr/Sting/dist/GenomeAnalysisTK.jar

Reference:
Build 37. NOTE: chromosome names do not have "chr" as prefix - just numbers of
/ifs/data/c2b2/ip_lab/shares/DATA/Exome_pipeline/resources/human_g1k_v37.fasta

hg18:
/ifs/data/c2b2/ip_lab/shares/DATA/Sequencing/resources/Homo_sapiens_assembly18.fasta

build 36:
/ifs/data/c2b2/ip_lab/shares/DATA/Sequencing/resources/human_b36_both.fasta