Additional checks of critical items

Author: keiranmraine

.travis.yml

@@ -40,3 +40,7 @@ before_script:
 script:
  - ./setup.sh ~/wtsi-opt
  - ~/wtsi-opt/bin/samtools view # dump usage to show intact
+ - ~/wtsi-opt/bin/diff_bams -h
+ - ~/wtsi-opt/bin/reheadSQ -h
+ - ~/wtsi-opt/bin/bam_stats -h
+ - ~/wtsi-opt/bin/bwa_mem.pl -h