fixes #1514 so we can use unzip rather than tar when using zips; also allows postInstallCmds to be specified
fixes #1423 so we use unzip to unpack the zips; and fixes #1564 so we can configure post install commands in the PID
#1501 enable being able to delete java / process child containers via the hawtio console; they don't disappear from the 'ps' command yet though
fixes #1501 so that deleting processes / java containers also removes them from the 'ps' command line tool
enabled gitbook in the site build  #1409