Auto-update of transmart.

This works by querying the Bamboo API for latests build results on a
certain plan. It extracts the last build time and the last build date.
If we have no record of the last build date we saw or it's different
from the one gotten from the API, then we undeploy transmart, stop
tomcat, download the new war file to tomcat/webapps and start tomcat
again.