Added GATK 3.8

docs/Software_installation.md

@@ -140,3 +140,13 @@ cd XlsxWriter
 /home/u035/project/software/bcbio/anaconda/bin/python3 setup.py install --prefix /home/u035/project/software
 rsync -av xlsxwriter ../../lib/python3.6/site-packages
 ```
+
+## GATK 3.8
+
+```
+cd /home/u035/project/software/install
+wget https://storage.googleapis.com/gatk-software/package-archive/gatk/GenomeAnalysisTK-3.8-0-ge9d806836.tar.bz2
+bzip2 -d GenomeAnalysisTK-3.8-0-ge9d806836.tar.bz2 
+tar -xf GenomeAnalysisTK-3.8-0-ge9d806836.tar
+mv GenomeAnalysisTK-3.8-0-ge9d806836 ../GenomeAnalysisTK-3.8
+```