Include tribble build/tests in main build.xml, some refactoring.
Include tribble build/tests in main build.xml, some refactoring.

Use sam version number for tribble

alecw/picard,nh13/picard,broadinstitute/picard,annkupi/picard,broadinstitute/picard,annkupi/picard,broadinstitute/picard,alecw/picard,broadinstitute/picard,annkupi/picard,broadinstitute/picard,nh13/picard,nh13/picard,annkupi/picard,alecw/picard,nh13/picard,alecw/picard